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InterviewSolution
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How many 4-digit odd number can be formed using the digit 0,2,3,5,6,8 (each digit occurs only once)?A. 64B. 72C. 86D. 96 |
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Answer» If a number is odd, then the units digit of the number must contain any one of the numbers 1,3,5,7 or 9. Given digits are 0,2,3,5,6,8. Here units digit must contain either 3 or 5,i.e.,2 ways. First place can be filled in 4 ways (since ten thousand pace can not be filled with 0). Second place and thrid digit can be filled in 4 and 3 ways respectively. The required number of odd numbers =`4xx4xx3xx2=96`. |
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