In how many ways can Annie, Bushra, Camellia, Don, Eliza and Farzana be seated if Annie and Bushra cannot be seated next to each other?

In how many ways can Annie, Bushra, Camellia, Don, Eliza and Farzana be seated if Annie and Bushra cannot be seated next to each other?

A 240

B 360

C 480

D 600

Solution

Correct Answer: Option D

Suppose,

number of people =10

total expenditure= G

per person pay= g/10

if n number of people are added then per person pays=G/10+n

So, expenditure reduces= G/10-G/10+n=Gn/100+10n