In how many ways can a group of 5 boys and 5 girls be seated in a row of 10 seats if boys and girls must alternate in the row?
Consider that the boys can be arranged in 5! ways in their respective positions and the same for the girls.
And we can either seat the boys first, or the girls first........so
5! * 5! * 2 = 120^2 * 2 = 28,800 ways
