Subject: mathqa
Question: a certain fruit stand sold apples for $ 0.70 each and guava for $ 0.50 each . if a customer purchased both apples and bananas from the stand for a total of $ 6.30 , what total number of apples and bananas did the customer purchase ?
Option: 
A: 14
B: 11
C: 13
D: 5
Answer: B