अंकों (0,1,2,3,4,5,6,7) से बिना पुनरावृत्ति (3)-अंकीय सम संख्याएं कितनी बनेंगी?
Using the digits (0,1,2,3,4,5,6,7) without repetition how many (3)-digit even numbers can be formed?
Explanation opens after your attempt
C. (150) संख्याएं(150) numbers
Concept
If the last digit is (0) there are \(7 \times 6=42\) ways and if the last digit is (2,4,6) there are \(3 \times 6 \times 6=108\) ways. The total is (42+108=150).
Why this answer is correct
The correct answer is C. (150) संख्याएं / (150) numbers. If the last digit is (0) there are \(7 \times 6=42\) ways and if the last digit is (2,4,6) there are \(3 \times 6 \times 6=108\) ways. The total is (42+108=150).
Exam Tip
अंतिम अंक (0) हो तो \(7 \times 6=42\) तरीके हैं और अंतिम अंक (2,4,6) हो तो \(3 \times 6 \times 6=108\) तरीके हैं। कुल (42+108=150) है।
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