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How many (3)-digit numbers can be formed from digits (2,3,4,5) with repetition allowed?अंकों (2,3,4,5) से पुनरावृत्ति सहित (3)-अंकीय संख्याएँ कितनी बनेंगी?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (64)(64)
Each place has (4) choices, so (4\times4\times4=64). With repetition, each place keeps the same choices.हर स्थान के (4) विकल्प हैं इसलिए (4\times4\times4=64)। पुनरावृत्ति होने पर हर स्थान पर समान विकल्प रहते हैं।
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