अंकों (1,2,3,4,5,6,7) से बिना पुनरावृत्ति (3)-अंकीय सम संख्याएं कितनी बनेंगी?

Using the digits (1,2,3,4,5,6,7) without repetition how many (3)-digit even numbers can be formed?

Explanation opens after your attempt
Correct Answer

A. (90) संख्याएं(90) numbers

Step 1

Concept

There are (3) choices (2,4,6) for the unit place then (6) and (5) choices remain. The total is \(3 \times 6 \times 5=90\).

Step 2

Why this answer is correct

The correct answer is A. (90) संख्याएं / (90) numbers. There are (3) choices (2,4,6) for the unit place then (6) and (5) choices remain. The total is \(3 \times 6 \times 5=90\).

Step 3

Exam Tip

इकाई स्थान पर (2,4,6) के (3) विकल्प हैं फिर (6) और (5) विकल्प बचते हैं। कुल \(3 \times 6 \times 5=90\) है।

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Mathematics Answer, Explanation and Revision Hints

अंकों (1,2,3,4,5,6,7) से बिना पुनरावृत्ति (3)-अंकीय सम संख्याएं कितनी बनेंगी? / Using the digits (1,2,3,4,5,6,7) without repetition how many (3)-digit even numbers can be formed?

Correct Answer: A. (90) संख्याएं / (90) numbers. Explanation: इकाई स्थान पर (2,4,6) के (3) विकल्प हैं फिर (6) और (5) विकल्प बचते हैं। कुल \(3 \times 6 \times 5=90\) है। / There are (3) choices (2,4,6) for the unit place then (6) and (5) choices remain. The total is \(3 \times 6 \times 5=90\).

Which concept should I revise for this Mathematics MCQ?

There are (3) choices (2,4,6) for the unit place then (6) and (5) choices remain. The total is \(3 \times 6 \times 5=90\).

What exam hint can help solve this Mathematics question?

इकाई स्थान पर (2,4,6) के (3) विकल्प हैं फिर (6) और (5) विकल्प बचते हैं। कुल \(3 \times 6 \times 5=90\) है।