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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

Answer: Option A

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

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Comments ( 2 )

  1. Mani Kumar
    Mani Kumar :
    3 years ago

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

    Thanks..

  2. Nagamani
    Nagamani :
    5 years ago

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

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