अंकों (2,5,8) से पुनरावृत्ति की अनुमति होने पर कितनी (2)-अंकीय संख्याएँ बन सकती हैं?

How many (2)-digit numbers can be formed from digits (2,5,8) if repetition is allowed?

Explanation opens after your attempt
Correct Answer

C. (9)

Step 1

Concept

There are (3) choices for each place, so \(3\times3=9\). With repetition, choices do not decrease.

Step 2

Why this answer is correct

The correct answer is C. (9). There are (3) choices for each place, so \(3\times3=9\). With repetition, choices do not decrease.

Step 3

Exam Tip

दोनों स्थानों पर (3) विकल्प हैं इसलिए \(3\times3=9\)। पुनरावृत्ति हो तो विकल्प कम नहीं होते।

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Mathematics Answer, Explanation and Revision Hints

अंकों (2,5,8) से पुनरावृत्ति की अनुमति होने पर कितनी (2)-अंकीय संख्याएँ बन सकती हैं? / How many (2)-digit numbers can be formed from digits (2,5,8) if repetition is allowed?

Correct Answer: C. (9). Explanation: दोनों स्थानों पर (3) विकल्प हैं इसलिए \(3\times3=9\)। पुनरावृत्ति हो तो विकल्प कम नहीं होते। / There are (3) choices for each place, so \(3\times3=9\). With repetition, choices do not decrease.

Which concept should I revise for this Mathematics MCQ?

There are (3) choices for each place, so \(3\times3=9\). With repetition, choices do not decrease.

What exam hint can help solve this Mathematics question?

दोनों स्थानों पर (3) विकल्प हैं इसलिए \(3\times3=9\)। पुनरावृत्ति हो तो विकल्प कम नहीं होते।