A sum of rs 500 is in the form of denominations of rs 5 and rs 10 . if the total number of notes is rs 90 . find the number of notes of each type
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Answer:
No. of Rs 5 notes = 80
No. of Rs 10 notes = 10
Step-by-step explanation:
Let no. of Rs 5 notes be x and no. of Rs 10 notes be y
Total number of notes is 90 ⇒ x + y = 90 ........(1)
Total amount = 500
5x + 10y = 500 ...(2)
Multiply equation (1) by 10
10x + 10y = 900 .....(3)
Subtracting equation (2) from equation (3)
5x = 400
x = 80
y = 10
No. of Rs 5 notes = 80
No. of Rs 10 notes = 10
Hope that this helps you...
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