Find the number of ways of seating 10 students `A_(1), A_(2)…..A_(10)` in a row such that (i) `A_(1), A_(2), A_(3)` sit together (ii) `A_(1), A_(2), A_(3)` sit in a specified order (iii) `A_(1), A_(2),A_(3)` sit together ina specified order.

Answer

`therefore` The number of ways of `A_(1), A_(2), A_(3)` sit together in specified order =8! Ways.