A probability problem by Johnson Du

Probability Level 2

A group with 15 students. The teacher need to randomly chose 5 of them to go to a compitition. Then the teacher need to randomly chose another 5 for oversea study. Then chose another five for a field trip. How many ways the teahcer can chose.

9009 3256 756756 567567

Johnson Du by Johnson Du , 19, China

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1 solution

Johnson Du
Feb 18, 2015

15C5 x 10C5 x 5C5 =3003 x 252 x 1 =756756

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