Posted by Anonymous on Monday, February 18, 2013 at 8:21am.
A number of 4 different digits is formed by using 1, 2, 3, 4, 5, 6, 7. Find
the probability that it is divisible by 5.
Digits can be repeated

mathsurgently needed  Reiny, Monday, February 18, 2013 at 8:37am
It must end in a 5
number of cases = 7x7x7x1 = 343