Question

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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 type.. ​

Answer 1

80 notes of rs 5 and 10 notes of rupees 10

acc to ques

5x+10(90-x)=500

5x+900-10x=500

10x-5x=900-500

5x=400

x=400/5=80

and (90-x)=(90-80)=10

Answer 2

Answer: It is simple,

80 notes of ₹ 5 and 10 notes of ₹ 10.

According to the question,

5x + 10 (90 - x) = 500

⇒5x + 900 - 10x = 500

⇒10x - 5x = 900 - 500

⇒5x = 400

⇒x = 400/5 = 80

So,

    (90 - x) = (90 - 80) = 10

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