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Bunuel
At a store, Jonah bought only CDs and DVDs. If he bought a total of 12 items, how many CDs did he buy?

(1) The average price of each DVD was $10.

(2) The average price of each CD was $16, and Jonah spent $80 on CDs.


­
Let the number of CDs and DVDs bought by Jonah be c and d respectively.

The total number of items bought is 12.

c + d = 12

We need to find the number of CDs = c = ?

Statement 1:

(1) The average price of each DVD was $10.

The average price of DVDs = $10, and we don’t know the number of dvd bought.

Hence, Insufficient

Statement 2:

(2) The average price of each CD was $16, and Jonah spent $80 on CDs.

average price of CD= $16 = [ Total price of CDs] / ( Number of CDs )

16 = $80/ c

c = 5

Sufficient

Option B
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