यदि \(A=\{1,2,3,4\}\) और \(B=\{0,1\}\) हों तो कितने फलन \(f:A\to B\) ऐसे हैं जिनमें कम से कम एक इनपुट की छवि (1) हो?

If \(A=\{1,2,3,4\}\) and \(B=\{0,1\}\), how many functions \(f:A\to B\) have at least one input with image (1)?

Explanation opens after your attempt
Correct Answer

C. (15)

Step 1

Concept

There are \(2^4=16\) total functions, and only the all-zero function is excluded. Hence there are (15) functions.

Step 2

Why this answer is correct

The correct answer is C. (15). There are \(2^4=16\) total functions, and only the all-zero function is excluded. Hence there are (15) functions.

Step 3

Exam Tip

कुल \(2^4=16\) फलन हैं और केवल सभी मान (0) वाला (1) फलन हटेगा। इसलिए (15) फलन हैं।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A=\{1,2,3,4\}\) और \(B=\{0,1\}\) हों तो कितने फलन \(f:A\to B\) ऐसे हैं जिनमें कम से कम एक इनपुट की छवि (1) हो? / If \(A=\{1,2,3,4\}\) and \(B=\{0,1\}\), how many functions \(f:A\to B\) have at least one input with image (1)?

Correct Answer: C. (15). Explanation: कुल \(2^4=16\) फलन हैं और केवल सभी मान (0) वाला (1) फलन हटेगा। इसलिए (15) फलन हैं। / There are \(2^4=16\) total functions, and only the all-zero function is excluded. Hence there are (15) functions.

Which concept should I revise for this Mathematics MCQ?

There are \(2^4=16\) total functions, and only the all-zero function is excluded. Hence there are (15) functions.

What exam hint can help solve this Mathematics question?

कुल \(2^4=16\) फलन हैं और केवल सभी मान (0) वाला (1) फलन हटेगा। इसलिए (15) फलन हैं।