(5) digits से (3)-digit numbers बनाने में repetition allowed हो तो first digit zero न होने की count कौन-सी होगी यदि digits में (0) भी है?
If (3)-digit numbers are formed from (5) digits with repetition allowed and one digit is (0), what is the count when the first digit cannot be zero?
Explanation opens after your attempt
A. \(4\times5\times5\)
Concept
The first place cannot have (0), so it has (4) choices and the remaining places have (5) choices. In exams check the leading zero condition first.
Why this answer is correct
The correct answer is A. \(4\times5\times5\). The first place cannot have (0), so it has (4) choices and the remaining places have (5) choices. In exams check the leading zero condition first.
Exam Tip
पहले स्थान पर (0) नहीं आ सकता इसलिए (4) choices हैं और बाकी स्थानों पर (5) choices हैं। परीक्षा में leading zero condition पहले देखें।
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