अंकों (0,1,5,7) से बिना पुनरावृत्ति कितनी (3)-अंकीय संख्याएँ बन सकती हैं?
How many (3)-digit numbers can be formed from digits (0,1,5,7) without repetition?
Explanation opens after your attempt
D. (18)
Concept
There are (3) choices for the hundreds place, then (3) and (2) choices, total (18). Zero is not allowed in the first place.
Why this answer is correct
The correct answer is D. (18). There are (3) choices for the hundreds place, then (3) and (2) choices, total (18). Zero is not allowed in the first place.
Exam Tip
सैकड़ा स्थान पर (3) विकल्प हैं, फिर (3) और (2) विकल्प मिलते हैं, कुल (18)। पहले स्थान पर (0) की अनुमति नहीं है।
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