Question

Mrs. Gibbs goes to the store to buy AA and 9V batteries. The store has 12 AA batteries and 15 9V batteries in stock. Mrs. Gibbs needs at least 6 AA batteries. In all, she wants to buy at least 20 batteries.

Mrs. Gibbs buys 7 AA batteries.

How many 9V batteries could she buy?
Select all that apply.

11

12

13

14

15

Answer 1

I'm sure it's 12 and 13 :)

Answer 2

The store has a stock of 12 AA batteries and 15 9V batteries. So, these are the limits of the batteries that Mrs. Gibbs can only buy. She already bought 7 pieces of AA batteries. Then, she needs to buy only at least 20 batteries. Therefore, she should buy all of the stock of AA batteries which is 12 pieces.