अंकों (4,5,6) से पुनरावृत्ति की अनुमति होने पर कितनी (3)-अंकीय संख्याएँ बनेंगी?
How many (3)-digit numbers can be formed from digits (4,5,6) if repetition is allowed?
Explanation opens after your attempt
Correct Answer
B. (27)
Concept
There are (3) choices for each of the three places, so \(3^3=27\). With repetition allowed, choices remain the same at every place.
Why this answer is correct
The correct answer is B. (27). There are (3) choices for each of the three places, so \(3^3=27\). With repetition allowed, choices remain the same at every place.
Exam Tip
तीनों स्थानों पर (3) विकल्प हैं इसलिए \(3^3=27\)। repetition allowed हो तो हर स्थान पर समान विकल्प रहते हैं।
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