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Question

how many odd numbers of 5 digits can be formed with the digits 0,2,3,4,5 without repeating any digit

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Solution

The ones place can be filled with 3 or 5.So, there are 2 ways to fill ones place.Now, we can not put 0 in the ten thousands place.So, number of ways to fill ten thousands place = 3Number of ways to fill hundreds place = 3Number of ways to fill tens place = 2Required number of words = 3 ×3×2×1×2 = 36

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