Question

A local video store owner is examining his two stores the one on 29th avenue and the other on division. The 29th store does 70% of the dealer's business and the divison store does rhe rest. In the division 40% of all rentals are DVDs. In rhw 29th store , 30% of all rentals are DVDs. If a customer is selected at random , what is the probability that they will rent a dvd?

0.70
0.37
0.35
0.33
0.18

Answer 1

0.37 is the correct answer

Answer 2

0.33

Explanation:

Suppose 100 customers:

• 70 goes to the 29th store. 30% of them (21) rent DVDs

• 30 goes to the division store. 40% of them (12) rent DVDs

So, 21 + 12 = 33 out of 100 rent DVDs, that is a probability of 33/100 = 0.33