99 Percentile Qs Bank for JEE MainMathematicsPermutation and Combination
The number of ways of arranging 8 boys and 8 girls in a row so that boys and girls sit alternately is
Options
- A9 !
- B(9 !)(8 !)
- C(8 !)^2
- D2 !(8 !)^2
Correct answer
D. 2 !(8 !)^2
Step-by-step solution
We have, 8 boys and 8 girls. To tal number of arrangements of 8 boys and 8 girls. Sit altemately is 8 ! 8 ! 2 !=2 !(8 !)^2