A box has 210 coins of denominations one - rupee and fifty paisa only. The ratio of their respective values is 13 : 11. The number of one - rupee coin is
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Respective ratio of the number of coins;
= 13 : 11 × 2 = 13 : 22
Hence, Number of 1 rupee coins;
= 13×210 / 13+22
= 78
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78
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