bmwhype2 wrote:

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

This could be put in a format RRRBB. So total ways of choosing is 5! and since there are 3 R and 2 B, putting the R/B differently within each color pattern does not change anything so we need to remove them. So the formula is 5!/(3!2!) = 10

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Regards

Ganesh

Class of 2012

Great Lakes Institute of Management

http://greatlakes.edu.in