Examveda

# 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

A. 65

B. 66

C. 77

D. 78

### Solution(By Examveda Team)

Respective ratio of the number of coins;
= 13 : 11 × 2 = 13 : 22
Hence, Number of 1 rupee coins;
= $$\frac{{13 \times 210}}{{13 + 22}}$$   = 78