A sum of 500 is in the form of denominations of 75 and 10. If the total number of
notes is 90 find the number of notes of each denomination
(Hint: let the number of 5 rupee notes be *x, the number of 10 rupee notes=90-
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Answer:
Step-by-step explanation:
Let the number of Rs 5 notes be x
Total number of notes = 90
Hence the number of Rs 10 notes be (90 − x)
Total sum of money = Rs 500
∴ 5x + 10 (90 − x) = 500
5x + 900 − 10x = 500
− 5x = 500 − 900
-5x = −400
∴ x = 80
Hence there are 80 notes of Rs 5
Number of Rs 10 notes = 90 - 80 = 10
Hence there are 10 notes of Rs 10.
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