Andrew has a certain number of coins in his pocket. He has three times as many dimes as quarters and six times as many

[VJesus12]

Andrew has a certain number of coins in his pocket. He has three times as many dimes as quarters and six times as many nickels as dimes. A nickel is worth $0.05, a dime is worth $0.10 and a quarter is worth $0.25. If he has a total of $10.15, then which of the following represents the number of dimes in Andrew’s pocket?

A. 9
B. 10
C. 18
D. 20
E. 21

Answer: E

Source: EMPOWERgmat