Question

Devesh I has a total of ₹590 as currency notes in denominations of ₹50,₹20 and ₹10. The ratio of the number of ₹50 notes and ₹20 notes is 3:5. If she has a total of 25 notes, how many notes of each denomination she has?

Answer 1

Hey!
Your answer is here
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Let the number of Rs.50 notes and Rs.20 notes be 3x and 5x respecrively.

No.of Rs.10 notes= 25-(3x+5x)
=(25-8x)×10
=250-80x

No.of Rs.50 notes= 50×3x

No.of Rs.20 notes= 20×5x

ATQ
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$150x + 100x + (250 - 80x) = 590 \\ 170x + 250 = 590 \\ 170x = 590 - 250 \\ 170x = 340 \\ x = \frac{340}{170} \\ x = 2$
So, No.of Rs.50 notes= 3x= 2×3= 6 notes
No.of Rs.20 notes=5x=5×2 = 10 notes
No.of Rs.10 notes= 25-8x= 25-16 = 9 notes
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