अंकों (3,6,9) से पुनरावृत्ति की अनुमति होने पर कितनी (2)-अंकीय संख्याएँ बनेंगी?

How many (2)-digit numbers can be formed from digits (3,6,9) if repetition is allowed?

Explanation opens after your attempt
Correct Answer

A. (9)

Step 1

Concept

There are (3) choices at both places, so \(3^2=9\). With repetition allowed, choices remain the same.

Step 2

Why this answer is correct

The correct answer is A. (9). There are (3) choices at both places, so \(3^2=9\). With repetition allowed, choices remain the same.

Step 3

Exam Tip

दोनों स्थानों पर (3) विकल्प हैं इसलिए \(3^2=9\)। repetition allowed हो तो विकल्प वही रहते हैं।

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Mathematics Answer, Explanation and Revision Hints

अंकों (3,6,9) से पुनरावृत्ति की अनुमति होने पर कितनी (2)-अंकीय संख्याएँ बनेंगी? / How many (2)-digit numbers can be formed from digits (3,6,9) if repetition is allowed?

Correct Answer: A. (9). Explanation: दोनों स्थानों पर (3) विकल्प हैं इसलिए \(3^2=9\)। repetition allowed हो तो विकल्प वही रहते हैं। / There are (3) choices at both places, so \(3^2=9\). With repetition allowed, choices remain the same.

Which concept should I revise for this Mathematics MCQ?

There are (3) choices at both places, so \(3^2=9\). With repetition allowed, choices remain the same.

What exam hint can help solve this Mathematics question?

दोनों स्थानों पर (3) विकल्प हैं इसलिए \(3^2=9\)। repetition allowed हो तो विकल्प वही रहते हैं।