Examveda

In how many ways 4 boys and 3 girls can be seated in a row so that they are alternate.

A. 144

B. 288

C. 12

D. 256

Solution(By Examveda Team)

Let the Arrangement be,
B G B G B G B
4 boys can be seated in 4! Ways
Girl can be seated in 3! Ways
Required number of ways,
= 4! × 3!
= 144

1. Dear Nagamani,
! means "Factorial"
Ex: 1!=1
2!=1x2=2
3!=1x2x3=6
4!=1x2x3x4=24
......................
......................
n!=1x2x3x4x5x6x........xn

Thanks..

2. i dont understand these solutions what 4!3!means what '!' symbolises

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