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i. How many 4 digit number can be formed using the digits 3, 5, 8, 9 if repetition is not allowed? ii. How many of these numbers end in 3? iii. How many of the above numbers mentioned in (i) ends in 3 or 5? |
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Answer» <P> II. `""^(3)P_(3)xx1=3! =6` III. 12 |
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