Question

12 chairs are atrranged in a row numbered 1 to12. 4 men have to be seated in these chairs so that the chairs numbered 1 to 8 should be occupied and no two men occupy adjacent chairs.Find the number of ways the task can be done​

Answer 1

Answer:

in 1 to 8 chair 4 mwn should be seat so the dont adjacent..

1st way four men occupy 0dd no sear = 4! = 24

2nd way four men occupy even no seat = 4! = 24

total number of ways = 24+24 = 48