Question

A sum of 500 is in the form of denominations of 5 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', then number of 10 rupee notes = 90-x)​

Answer 1

Answer:

Let the number of 5 rupee notes be x,then

The number of 10 rupee notes =90−x

Then ,according to the question

5x+10(90−x)=500

5x+900−10x=500

5x=400

x=80

There are 80 notes of Rs.5 and 10 notes of Rs.10.

Step-by-step explanation:

Let us assume the number of 5 rupees note be 'x'. Then the number of 10 rupees note will be '90-x' (Total number of notes=90)

The total amount is 500. So according to the question:

5x+10(90-x)=500

5x+900–10x=500

-5x=500–900

-5x=—400

X=—400/—5 (Since, — and — = +)

X=400/5

X=80

Hence, according to our solution:—

Number of 5 rupees note=X that is 80

And number of 10 rupees note=(90-x) that is (90–80)=10

Therefore, there are 80 five rupees note and 10 ten rupees note..

Answer 2

I hope it is helpful for you all....