There are 3 red chips and 2 blue ones. When arranged in a row, they form a certain color pattern, for example RBRRB. How many color patterns? Choose the correct choice from the following answers:
A) 10	B) 12	C) 24	D) 60	E) 100
There are 3 red chips and 2 blue ones.   When arranged in a row, they form a certain color pattern, for example RBRRB. How many color patterns?   10   12   24   60   100   Soln: Total number of patterns is 5!   Since 3 red chips are identical and 2 blue ones are identical thus we have   = 5!/(2! * 3!)   = 10 such different patterns 10
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There are 3 red chips and 2 blue ones. When arranged in a row, they form a certain color pattern, for example RBRRB. How many color patterns?