Question

a total of 90 currency notes consisting of 5 rupees and 10 rupees dominations want to 500 rupees find number of notes in each nominations.​

Answer 1

Answer:

No. of 5 rupees notes = 80

No. of 10 rupees notes = 10

Step-by-step explanation:

Let the no. of 5 rupees notes be x and no. of 10 rupees notes be y

So, the total no. of notes =90

ie, x+y=90

x=90-y

Now,

5x+10y=500

5(90-y)+10y=500

450-5y+10y=500

5y=50

y=50/5

y=10

x=90-10

x=80

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