Question

Lakshmi is a cashier in a bank. She has currency notes of denominations Rs 100, Rs 50 and Rs 10, respectively. The ratio of the number of these notes is 2:3:5. The total cash with Lakshmi is Rs 4, 00,000. How many notes of each denomination does she have?

Answer 1

Let the common ratio between the numbers of notes of different denominations be x. Therefore, numbers of Rs 100 notes, Rs 50 notes, and Rs 10 notes will be2x, 3x, and 5x respectively.

Amount of Rs 100 notes = Rs (100 × 2x) = Rs 200x

Amount of Rs 50 notes = Rs (50 × 3x)= Rs 150x

Amount of Rs 10 notes = Rs (10 × 5x) = Rs 50x

It is given that total amount is Rs 400000. 

∴ 200x + 150x + 50x = 400000

=> 400x = 400000

On dividing both sides by 400, we obtain x = 1000

Number of Rs 100 notes = 2x = 2 × 1000 = 2000 

Number of Rs 50 notes = 3x = 3 × 1000 = 3000 

Number of Rs 10 notes = 5x = 5 × 1000 = 5000