(math)combination, probability question?

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(math)combination, probability question?

A group of 5 boys and 4 girls are to be photographed. How many ways can the photograph be arranged with the girls in the front row and the boys in the back row?

2007-05-02 17:22:57 · 3 answers · asked by kitty 1 in Science & Mathematics ➔ Mathematics

3 answers

4!*5!

2007-05-02 17:26:20 · answer #1 · answered by bruinfan 7 · 1⤊ 0⤋

the answer is 2880;
see:
the boys can stand at 5! ways and the girls can do it at 4! ways
so 5! * 4! = 2880
i mean ( 5*4*3*2*1) * ( 4*3*2*1 ) = 2880
got it?

2007-05-03 00:29:47 · answer #2 · answered by Farid 1 · 0⤊ 0⤋

5! * 4!

2007-05-03 00:31:01 · answer #3 · answered by Tommy 2 · 0⤊ 0⤋