SOLUTION: Five cards numbered with digits 3,4,6,7,8 are shuffled and laid in a row to make a 5 digit number. The probability that this number is divisible by 9 is

Question 1138490: Five cards numbered with digits 3,4,6,7,8 are shuffled and laid in a row to make a 5 digit number. The probability that this number is divisible by 9 is
Answer by ikleyn(52898) (Show Source): You can put this solution on YOUR website!
.


The sum of the digits is  3 + 4 + 6 + 7 + 8 = 28.


This number, 28, is not divisible by 9.


Therefore, any number written as a permutation of these 5 digits, IS NOT DIVISIBLE by 9.


Therefore, the answer regarding the probability is 0 (zero, ZERO).

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