Andrew has a certain number of coins in his pocket. He has three times as many dimes as quarters and five 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? Pick.
A) 9  B) 10  C) 18  D) 24  E) 21
E.   Let number of quarters be q. Therefore , dimes are 3q and nickels are 18q.   Total value = 15q(.05) + 3q(0.1) + .25q =1.3q   Given total value = 10.15   therefore, 1.3q=10.15 or q=8   Number of dimes = 3q or 24   Answer : 24
<result>D</result>
Andrew has a certain number of coins in his pocket. He has three times as many dimes as quarters and five 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?