Book Maths Puzzle

In how many ways can 5 blue balls, 4 white balls and the rest 6 of different colour balls be arranged in a row?

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Book Other Question

How many numbers not exceeding 10000 can be made using the digits 2,4,5,6,8 if repetition of digits is allowed? From a group of 8 women and 6 men, a committee consisting of 3 men and 3 women is to be formed. In how many ways can the committee be formed if two of the men refuses to serve together?