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How many (2)-digit even numbers can be formed from digits (0,2,4,6,8) without repetition?अंकों (0,2,4,6,8) से बिना पुनरावृत्ति कितनी (2)-अंकीय सम संख्याएँ बन सकती हैं?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (16)(16)
If the unit digit is (0), there are (4) ways, and if it is a non-zero even digit, there are (4\times3=12) ways, total (16). Make cases for zero questions.इकाई पर (0) हो तो (4) तरीके और इकाई पर गैर-शून्य सम अंक हो तो (4\times3=12) तरीके हैं, कुल (16)। शून्य वाले प्रश्न में cases बनाएं।
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