24I dont have the answer in book..can u give urs ??plzz
If n positive integers are taken together and multiplied ,find the probablty that last digit is 2,4,6,8
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5 Answers
62This question is same as the probability that all N integers are not odd.. and that a multiple of 5 does not appear either...
Can you use this logic to get the answer?
62The n numbers should have their last digit as 1, 2, 3, 4, 6, 7, 8, 9
(8/10)n
The numbers here which have no even number number selected will have all of them made out of 1 3 7 9
The probability of which is (0.4)n
Hence the required probability is (0.8)n-(0.4)n
3sir i think u have found the probability of the product of the n digits is 0,2,4,6,8 but that is not asked.
62no sankara... i have not done that.. i have not considered either 5 or 10.. hence the last digit cannot be zero :)