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How many (3)-digit numbers can be formed from digits (1,3,5,7,9) without repetition?अंकों (1,3,5,7,9) से पुनरावृत्ति बिना (3)-अंकीय संख्याएँ कितनी बनेंगी?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (60)(60)
The choices for three places are (5,4,3), so (5\times4\times3=60). While filling positions, track remaining choices.तीन स्थानों के विकल्प (5,4,3) हैं इसलिए (5\times4\times3=60)। स्थान भरते समय बचे हुए विकल्प देखें।
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