Question 20
Back to Exercise
In how many ways can 5 boys and 4 girls stand in a row so that no two girls are next to each other?
- A 2,880
- B 43,200 Correct
- C 17,280
- D 86,400
Correct Answer: Option B
Boys first: 5! = 120
6 gaps around them; girls take 4 gaps in order: 6P4 = 360
120 × 360 = 43,200
Trap: 2,880 puts the girls in fixed gaps.
Answer: 43,200
Discussion & Comments 0
Share your method, a shortcut, or ask about a step you didn't follow.
No comments yet. Be the first to share your solution!