Nathalie has some quarters,dimes and nickels.The ratio of the number of
quarters to the number of dimes to the number of nickels that she has is 9:3:1.
The total value of these coins is $18.20.How many coins does Nathalie have?
(A)130 (B)117 (c)98 (d)91 (e)140
MATHS
2008-04-27 1:32 am
回答 (1)
2008-04-27 2:06 am
✔ 最佳答案
Ans: (d)91It is the fact that quarters = $0.25, dimes = $0.1, nickels = $0.05
Let X be the number of nickels, then
18.2 = 9X(0.25) + 3X(0.1) + X(0.05)
18.2 = 2.25X + 0.3X + 0.05X
X = 18.2 / 2.6
=7
Total number of coins = 7(9+3+1) = 91
收錄日期: 2021-04-25 13:36:45
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