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How many (2)-digit numbers can be formed from digits (2,4,6,8) without repetition?अंकों (2,4,6,8) से पुनरावृत्ति बिना (2)-अंकीय संख्याएँ कितनी बनेंगी?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (12)(12)
The first place has (4) choices and the second has (3), so (4\times3=12). Without repetition, choices decrease at the next place.पहले स्थान के (4) और दूसरे के (3) विकल्प हैं इसलिए (4\times3=12)। बिना पुनरावृत्ति हर अगले स्थान पर विकल्प घटते हैं।
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