12 balls are distributed among 3 boxes find the probabilty that 1st box will contain 3 balls?
I am solving the question assuming that the balls are indistinguishable since its not specified in the problem.
if the 1st box contains 3 balls this means there are 9 balls left to be distributed in 2 boxes whic can be done in 10C1 ways and the number of elements in the sample space is 14C3 so the probability should be 10/364