# Question #4cce4

##### 1 Answer

(a)

(b)

#### Explanation:

Problem (a)

Three particular books can be put together in

With each of these we can put the other two books either before them (

Therefore, the total number of ways

Problem (b)

The two biggest books can be positioned at each end of a set of

With each of them the other three books can be positioned between them in

Therefore, the total number of ways