In bag there are coins of 25 paisa, 50 paisa and 1 rupee in the ratio of 3 : 4 : 5. If there are in all Rs. 31, then how many 1 rupee coins are there in the bag?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 20
Let the number of coins be 3x, 4x and 5x.
Total money = 31Rs. or 3100 paisa.
A/c to question,
(25 × 3x) + (50 × 4x) + (100 × 5x) = 3100
75x + 200x + 500x = 3100
775x = 3100
x = 4
Number of 1Rs. coin = 5x = 20