अंकों (2,3,4,5,6,7) से बिना पुनरावृत्ति (3)-अंकीय सम संख्याएं कितनी बनेंगी?
Using the digits (2,3,4,5,6,7) without repetition how many (3)-digit even numbers can be formed?
Explanation opens after your attempt
C. (60) संख्याएं(60) numbers
Concept
There are (3) even choices for the unit place then (5) and (4) choices remain so \(3 \times 5 \times 4=60\). For even numbers fix the unit place first.
Why this answer is correct
The correct answer is C. (60) संख्याएं / (60) numbers. There are (3) even choices for the unit place then (5) and (4) choices remain so \(3 \times 5 \times 4=60\). For even numbers fix the unit place first.
Exam Tip
इकाई स्थान के लिए (3) सम विकल्प हैं फिर (5) और (4) विकल्प बचते हैं इसलिए \(3 \times 5 \times 4=60\)। सम संख्या में इकाई स्थान पहले तय करें।
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