Question

A sum of 800rs is in the form of denominations of 10rs and 20rs. If the total number of notes is 50, find the number of notes each type.​

Answer 1

Let there be x notes of Rs 10

Total no of notes = 50

No of notes of Rs 20 = (50-x)

Total sum of money= 800

10x + 20 (50-x) = 800

10x + 1000 - 20x = 800

-10x = 800 - 1000

-10x = -200

x = 20

50-x = 50-20=30

So, there are 20 notes of Rs 10 and 30 notes of Rs 20.

Hope it helps :)

Answer 2

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Let there be x notes of Rs 10

Total no of notes = 50

No of notes of Rs 20 = (50-x)

Total sum of money= 800

10x + 20 (50-x) = 800

10x + 1000 - 20x = 800-10x

= 800 - 1000-10x = -200x

= 2050-x = 50-20

=30

So, there are 20 notes of Rs 10 and 30 notes of Rs 20.

• Hope it will helps ✅