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单选题
In a wallet containing nickels and dimes, the ratio of nickels to dimes is 2：5. If there are 42 coins in all, what is the value of the dimes?
A
$1. 20
B
$3. 00
C
$1. 50
D
75€
E
30€
参考答案
参考解析
解析：
Let 2x the number of nickels and 5x the number of dimes, then 2x+5x=42, so x=6. There are 30 dimes, worth $3.00.
Let 2x the number of nickels and 5x the number of dimes, then 2x+5x=42, so x=6. There are 30 dimes, worth $3.00.
更多 “单选题In a wallet containing nickels and dimes, the ratio of nickels to dimes is 2：5. If there are 42 coins in all, what is the value of the dimes?A $1. 20B $3. 00C $1. 50D 75€E 30€” 相关考题
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