Question:
It is required to seat 5 men and 4 women in a row so that the women occupy the even places. How many such arrangements are possible ?
Answer:
Total number of persons are 9 in which there are 5 men and 4 women
So total number of place = 9
Now women seat in even place
So total number od arrangement = 4! (_W_W_W_W_) (W-Woman))
Men sit in odd place
So total number of arrangement = 5! (MWMWMWMWM) (M-Man)
Now Total number of arrangement = 5!*4! = 120*24 = 2880
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