Question

A bag contains two-rupee, one-rupee and 50-p coins in the ratio 4 : 2 : 1. If the total money in the bag is rs 210. Find the number of one-rupee coins

Answer 1

Let the number of 2 rupee coins be = 4x

1 rupee coins = 2x

50 paise coins = x, 50 paise = 1/2 rupees

2 * 4x + 1 * 2x + 1/2 * x = 210

21x = 420

x = 20

Number of 1 rupee coins = 2x = 2 * 20 = 40