Answer:
There are 117 ways in which one shampoo and one conditioner can be selected
Step-by-step explanation:
We have
13 kinds of shampoo
9 kinds of conditioner
How many ways can one shampoo and one conditioner be selected
Basically, for each kind of shampoo, there are 9 kinds of conditioner. There are 13 kinds of shampoo
13*9 = 117
There are 117 ways in which one shampoo and one conditioner can be selected
