अंकों (2,5,8) से पुनरावृत्ति की अनुमति होने पर कितनी (2)-अंकीय संख्याएँ बन सकती हैं?
How many (2)-digit numbers can be formed from digits (2,5,8) if repetition is allowed?
Explanation opens after your attempt
C. (9)
Concept
There are (3) choices for each place, so \(3\times3=9\). With repetition, choices do not decrease.
Why this answer is correct
The correct answer is C. (9). There are (3) choices for each place, so \(3\times3=9\). With repetition, choices do not decrease.
Exam Tip
दोनों स्थानों पर (3) विकल्प हैं इसलिए \(3\times3=9\)। पुनरावृत्ति हो तो विकल्प कम नहीं होते।
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