A money box contains one-rupee and two-rupee coins in the ratio 5:6. If the total
value of the coins in the money box is 85, find the number of two-rupee coins.
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let the ratio be x
then one rupee coins = 5x
2 rupee coin = 2×6x
= 12x
total value = 85
12x + 5x = 85
17x = 85
x = 85/17
x = 5
one rupee coin = 5×5
= 25
2 rupee coin = 12 × 5
= 60
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