2018 · Q56
The number of ways in which 3 boys and 2 girls can be arranged in a queue, given that the 2 girls have to be next to each other, is
general-mental-abilityquantitative-aptitude
- A12
- B24
- C48
- D120
Explanation
Treat the two girls as a single block: then 4 units (the block plus 3 boys) can be arranged in 24 ways, and the girls can swap places within the block in 2 ways. The total is 24 × 2 = 48. Hence 48 arrangements.