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