Question

A sum of Rs 800 is in the form of denominators of rupees 10 and rupees 20. If the total number of notes be 50. find the number of notes of each type ?​

Answer 1

Answer: ₹ 10 notes = 20

₹ 20 notes = 30

Step-by-step explanation:

Let the number of ₹10 notes be x.

Let the number of ₹20 notes be y.

Now Given

Total sum is 800

Or we can write it as

10x + 20y = 800 ---------(i)

And

Total number of notes is 500

So

x + y = 50--------(ii)

Now calculating both equation we get

Multiplying equation (ii) with 10 we get

10x + 10y = 500

Now

10x + 20 y = 800

10x + 10y = 500 on subtracting we get

-------------------------

10 y = 300

y = 30

x = 20

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Answer 2

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