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2014-11-30T16:12:25+05:30

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Number of dimes is = 2 times the number of quarters, =  2 * n
amount A = n * $ 0.25 + 2 * n * $ 0.10
               = $ 0.45 * n

Amount = $ 0. 45 * 12 = $ 5.40


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2014-11-30T16:24:18+05:30
Given a box contains some quarters and some dimes in the ratio 1:2
Now A.T.Q

1.
Number of dimes = 2n
Amount  = n × $ 0.25 + 2 × n × $ 0.10
               = $ 0.45 × n
2.
Amount = $ 0. 45 × 12 = $ 5.40
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