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How many (2)-digit numbers can be formed from digits (0,3,6,9) without repetition?अंकों (0,3,6,9) से बिना पुनरावृत्ति कितनी (2)-अंकीय संख्याएँ बन सकती हैं?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (9)(9)
Zero cannot be in the tens place, so (3\times3=9) numbers are possible. Check the first-place condition in number formation.दहाई स्थान पर (0) नहीं आ सकता, इसलिए (3\times3=9) संख्याएँ बनेंगी। संख्या बनाते समय पहले स्थान की शर्त देखें।
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