Q. 10

# Write the number of ways in which 12 boys may be divide into three groups of 4 boys each.

Number of groups in which 12 boys are to be divided = 3

Now 4 boys can be chosen out of 12 boys in (12C48C44C4) ways.

=

These groups can be arranged in 3! ways.

Total number of ways =

= 5775

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