A man has some money with him in coins of denominations of Rs. 5, Rs. 2 and Rs. 1. The total number of coins was 150.
What is the total amount with the person?
Which of the below information is additionally required to answer the above question?

Given: 

A man has some money with him in coins of denominations of Rs. 5, Rs. 2 and Rs. 1

The total number of coins was 150.

Number of Rs. 5 coins = x, number of Rs. 2 coins = y, number of Rs. 1 coins = z

We know: x + y + z = 150

From option b: The number of coins of Rs. 1, Rs. 2 and Rs. 5 were in the ratio of 3 : 2 : 1.

3x + 2x + x = 150

6x = 150

x = 25

One rupee = 3x = 75

Two rupees = 2x = 50

Five rupees = x = 25

Total amount = 150

The total amount with the person is 150.

So, option b is sufficient of answer the question.

Thus, correct option is (b).