Concept-wise Practice

proper_subsets MCQ Questions for Class 11

proper_subsets se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

16 questions tagged with proper_subsets.

यदि \(A=\{1,2,3\}\), तो (P(A)-{\varnothing,A}) में कितने अवयव होंगे?

If \(A=\{1,2,3\}\), how many elements are in (P(A)-{\varnothing,A})?

Explanation opens after your attempt
Correct Answer

C. (6)

Step 1

Concept

(P(A)) has (8) elements, and removing \(\varnothing\) and (A) leaves (8-2=6). These are non-empty proper subsets.

Step 2

Why this answer is correct

The correct answer is C. (6). (P(A)) has (8) elements, and removing \(\varnothing\) and (A) leaves (8-2=6). These are non-empty proper subsets.

Step 3

Exam Tip

(P(A)) में (8) अवयव हैं और \(\varnothing\) तथा (A) हटाने पर (8-2=6) बचते हैं। ये गैर-रिक्त उचित उपसमुच्चय हैं।

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यदि \(A=\{p,q,r\}\), तो (\mathcal{P}(A)) के कितने अरिक्त उचित उपसमुच्चय हैं?

If \(A=\{p,q,r\}\), how many non-empty proper subsets are there in (\mathcal{P}(A))?

Explanation opens after your attempt
Correct Answer

C. (6)

Step 1

Concept

There are \(2^3=8\) total subsets. Removing \(\emptyset\) and (A) leaves (6) non-empty proper subsets.

Step 2

Why this answer is correct

The correct answer is C. (6). There are \(2^3=8\) total subsets. Removing \(\emptyset\) and (A) leaves (6) non-empty proper subsets.

Step 3

Exam Tip

कुल उपसमुच्चय \(2^3=8\) हैं। \(\emptyset\) और (A) हटाने पर (6) अरिक्त उचित उपसमुच्चय बचते हैं।

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यदि (A) में (3) तत्व हैं, तो (A) के अरिक्त उचित उपसमुच्चयों की संख्या कितनी होगी?

If (A) has (3) elements, how many non-empty proper subsets of (A) are there?

Explanation opens after your attempt
Correct Answer

B. (6)

Step 1

Concept

Total subsets are \(2^3=8\). Removing \(\varnothing\) and (A) gives (6) non-empty proper subsets.

Step 2

Why this answer is correct

The correct answer is B. (6). Total subsets are \(2^3=8\). Removing \(\varnothing\) and (A) gives (6) non-empty proper subsets.

Step 3

Exam Tip

कुल उपसमुच्चय \(2^3=8\) हैं। अरिक्त उचित उपसमुच्चयों के लिए \(\varnothing\) और (A) हटाने पर (6) बचते हैं।

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यदि (n(\mathcal{P}(B))=128) है, तो (B) के उचित उपसमुच्चयों की संख्या कितनी होगी?

If (n(\mathcal{P}(B))=128), how many proper subsets does (B) have?

Explanation opens after your attempt
Correct Answer

C. (127)

Step 1

Concept

There are (128) total subsets, and a proper subset does not include the whole set itself. So the number is (128-1=127).

Step 2

Why this answer is correct

The correct answer is C. (127). There are (128) total subsets, and a proper subset does not include the whole set itself. So the number is (128-1=127).

Step 3

Exam Tip

कुल उपसमुच्चय (128) हैं और उचित उपसमुच्चय में पूरा समुच्चय नहीं गिना जाता। इसलिए संख्या (128-1=127) होगी।

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यदि \(A=\{1,2,3,4\}\) है तो (A) के तीन तत्वों वाले उचित उपसमुच्चयों की संख्या कितनी है?

If \(A=\{1,2,3,4\}\) then how many proper subsets of (A) have exactly three elements?

Explanation opens after your attempt
Correct Answer

B. (4)

Step 1

Concept

The number of ways to choose three elements is \({}^4C_3=4\) and all are proper subsets. In exams a subset with size less than (n) is proper.

Step 2

Why this answer is correct

The correct answer is B. (4). The number of ways to choose three elements is \({}^4C_3=4\) and all are proper subsets. In exams a subset with size less than (n) is proper.

Step 3

Exam Tip

तीन तत्व चुनने के तरीके \({}^4C_3=4\) हैं और ये सभी उचित उपसमुच्चय हैं। परीक्षा में आकार (n) से छोटा हो तो उपसमुच्चय उचित होता है।

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यदि किसी समुच्चय के कुल उपसमुच्चय (32) हैं तो उस समुच्चय के उचित उपसमुच्चय कितने होंगे?

If a set has (32) total subsets then how many proper subsets will it have?

Explanation opens after your attempt
Correct Answer

B. (31)

Step 1

Concept

Total subsets are \(2^n=32\) so proper subsets are (32-1=31). In exams do not count the original set as a proper subset.

Step 2

Why this answer is correct

The correct answer is B. (31). Total subsets are \(2^n=32\) so proper subsets are (32-1=31). In exams do not count the original set as a proper subset.

Step 3

Exam Tip

कुल उपसमुच्चय \(2^n=32\) हैं इसलिए उचित उपसमुच्चय (32-1=31) होंगे। परीक्षा में मूल समुच्चय को उचित उपसमुच्चय में न गिनें।

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यदि (A) में (5) अवयव हैं तो (A) के ऐसे उपसमुच्चयों की संख्या क्या है जो (A) के बराबर नहीं हैं?

If (A) has (5) elements, how many subsets of (A) are not equal to (A)?

Explanation opens after your attempt
Correct Answer

C. (31)

Step 1

Concept

Subsets not equal to (A) are proper subsets, and their number is \(2^5-1=31\). Only the whole set is removed once.

Step 2

Why this answer is correct

The correct answer is C. (31). Subsets not equal to (A) are proper subsets, and their number is \(2^5-1=31\). Only the whole set is removed once.

Step 3

Exam Tip

बराबर नहीं होने वाले उपसमुच्चय ही उचित उपसमुच्चय हैं और उनकी संख्या \(2^5-1=31\) है। पूरा समुच्चय केवल एक बार हटता है।

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यदि किसी समुच्चय के (15) उचित उपसमुच्चय हैं तो उसके पावर समुच्चय में कितने अवयव होंगे?

If a set has (15) proper subsets, how many elements are in its power set?

Explanation opens after your attempt
Correct Answer

B. (16)

Step 1

Concept

From proper subsets \(2^n-1=15\), we get \(2^n=16\). A power set has \(2^n\) elements.

Step 2

Why this answer is correct

The correct answer is B. (16). From proper subsets \(2^n-1=15\), we get \(2^n=16\). A power set has \(2^n\) elements.

Step 3

Exam Tip

उचित उपसमुच्चय \(2^n-1=15\) से \(2^n=16\) मिलता है। पावर समुच्चय में कुल \(2^n\) अवयव होते हैं।

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यदि (P(A)) में (64) अवयव हैं तो (A) के उचित उपसमुच्चयों की संख्या क्या होगी?

If (P(A)) has (64) elements, what is the number of proper subsets of (A)?

Explanation opens after your attempt
Correct Answer

C. (63)

Step 1

Concept

From \(2^n=64\), (n=6), and proper subsets are \(2^6-1=63\). Keep the formulas for power set and proper subsets separate.

Step 2

Why this answer is correct

The correct answer is C. (63). From \(2^n=64\), (n=6), and proper subsets are \(2^6-1=63\). Keep the formulas for power set and proper subsets separate.

Step 3

Exam Tip

\(2^n=64\) से (n=6) है और उचित उपसमुच्चय \(2^6-1=63\) होंगे। पावर समुच्चय और उचित उपसमुच्चय के सूत्र अलग रखें।

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यदि \(A=\{1,2,3,4\}\) है तो (A) के तीन अवयवों वाले उचित उपसमुच्चयों की संख्या क्या है?

If \(A=\{1,2,3,4\}\), how many proper subsets of (A) have exactly three elements?

Explanation opens after your attempt
Correct Answer

B. (4)

Step 1

Concept

The number of ways to choose three elements is \(\binom{4}{3}=4\). All are proper because the whole set has four elements.

Step 2

Why this answer is correct

The correct answer is B. (4). The number of ways to choose three elements is \(\binom{4}{3}=4\). All are proper because the whole set has four elements.

Step 3

Exam Tip

तीन अवयव चुनने की संख्या \(\binom{4}{3}=4\) है। ये सभी उचित हैं क्योंकि पूरा समुच्चय चार अवयवों का है।

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यदि \(A={x:x\) (50) से छोटे (10) के धनात्मक गुणज हैं(}) तो (A) के उचित उपसमुच्चयों की संख्या क्या है?

If \(A={x:x\) is a positive multiple of (10) less than (50)(}), how many proper subsets does (A) have?

Explanation opens after your attempt
Correct Answer

B. (15)

Step 1

Concept

\(A=\{10,20,30,40\}\) has (4) elements. Proper subsets are \(2^4-1=15\).

Step 2

Why this answer is correct

The correct answer is B. (15). \(A=\{10,20,30,40\}\) has (4) elements. Proper subsets are \(2^4-1=15\).

Step 3

Exam Tip

\(A=\{10,20,30,40\}\) में (4) अवयव हैं। उचित उपसमुच्चय \(2^4-1=15\) होते हैं।

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यदि \(A=\{1,2,3\}\) है तो (A) के सभी उचित उपसमुच्चयों की संख्या क्या है?

If \(A=\{1,2,3\}\), what is the number of all proper subsets of (A)?

Explanation opens after your attempt
Correct Answer

B. (7)

Step 1

Concept

A three element set has \(2^3=8\) total subsets. Removing the whole set (A) gives (7) proper subsets.

Step 2

Why this answer is correct

The correct answer is B. (7). A three element set has \(2^3=8\) total subsets. Removing the whole set (A) gives (7) proper subsets.

Step 3

Exam Tip

तीन अवयवों के कुल उपसमुच्चय \(2^3=8\) हैं। उचित उपसमुच्चय में पूरा (A) हटाने पर (7) बचते हैं।

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यदि किसी समुच्चय के उचित उपसमुच्चय (31) हैं तो उस समुच्चय में अवयवों की संख्या क्या है?

If a set has (31) proper subsets, how many elements does the set have?

Explanation opens after your attempt
Correct Answer

B. (5)

Step 1

Concept

The number of proper subsets is \(2^n-1\). From \(2^n-1=31\), we get (n=5).

Step 2

Why this answer is correct

The correct answer is B. (5). The number of proper subsets is \(2^n-1\). From \(2^n-1=31\), we get (n=5).

Step 3

Exam Tip

उचित उपसमुच्चय की संख्या \(2^n-1\) होती है। \(2^n-1=31\) से (n=5) मिलता है।

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यदि \(A=\{a,b,c,d\}\), तो (A) के उचित उपसमुच्चयों की संख्या कितनी है?

If \(A=\{a,b,c,d\}\), how many proper subsets does (A) have?

Explanation opens after your attempt
Correct Answer

A. (15)

Step 1

Concept

The total number of subsets is \(2^4=16\).

Step 2

Why this answer is correct

A proper subset does not include the set itself, so (16-1=15).

Step 3

Exam Tip

When proper subsets are asked, subtract the original set. चरण 1: कुल उपसमुच्चय \(2^4=16\) होंगे। चरण 2: उचित उपसमुच्चय में पूरा समुच्चय स्वयं शामिल नहीं होता, इसलिए (16-1=15)। चरण 3: उचित उपसमुच्चय पूछे जाने पर पूरे समुच्चय को घटाएँ।

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दो अवयवों वाले समुच्चय के उचित उपसमुच्चयों की संख्या कितनी होती है?

How many proper subsets does a set with two elements have?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

A set with (2) elements has \(2^2=4\) subsets.

Step 2

Why this answer is correct

For proper subsets, the set itself is not counted, so (4-1=3).

Step 3

Exam Tip

Exam tip: when proper subsets are asked, subtract the original set. चरण 1: (2) अवयवों वाले समुच्चय के कुल उपसमुच्चय \(2^2=4\) होते हैं। चरण 2: उचित उपसमुच्चयों में पूरा समुच्चय नहीं गिना जाता, इसलिए (4-1=3)। चरण 3: परीक्षा संकेत: उचित उपसमुच्चय पूछे तो पूरे समुच्चय को हटाएं।

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तीन अवयवों वाले समुच्चय के उचित उपसमुच्चयों की संख्या कितनी होती है?

How many proper subsets does a set with three elements have?

Explanation opens after your attempt
Correct Answer

B. (7)

Step 1

Concept

A set with three elements has \(2^3=8\) total subsets.

Step 2

Why this answer is correct

A proper subset excludes the whole set itself, so the count is (8-1=7).

Step 3

Exam Tip

In proper subset questions, remember to subtract one. चरण 1: तीन अवयवों वाले समुच्चय के कुल उपसमुच्चय \(2^3=8\) होते हैं। चरण 2: उचित उपसमुच्चय में पूरा समुच्चय हट जाता है। इसलिए संख्या (8-1=7) है। चरण 3: उचित उपसमुच्चय के प्रश्न में एक कम करना याद रखें।

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