A person has ₹1, ₹2, and ₹5 coins, and the total value of these coins is ₹320. The number of each type of coin is the same. How many total coins does he have?

Correct option is D

Given,

A man has = Rs. 320.

Coins of 1-rupee, 2-rupee and 5-rupee are equal.

Concept:

If N is divided into a : b, then

First part = N × a/(a + b)

Second part = N × b/(a + b)

Solution:

If coins of 1-rupee, 2-rupee and 5-rupee is equal,

Let the number of coins each of 1, 2 and 5 rupee be k

According to the question

k + 5k + 2k = 320

8k = 320

k = 320/8

k = 40

∴ Total number of coins = 3 × 40 = 120