Question

A sum of ₹500 is in the form od denominations os ₹5 and ₹10. If the total number of notes is 90 find the number of notes of each denomination.

Answer 1

step by step explanation

let number of notes of ₹5 = x

so the number of notes of ₹10 = 90–x

now

according to question

5 × x + 10×(90–x) = 500

5x + 900 –10x = 500

5x = 400

so x= 80 = number of notes of ₹5

and 90–x = 10 = number of notes of ₹10

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