Question

. A sum of ₹ 960 is in the form of denominations of ₹ 10 and ₹ 20. If the total

number of notes be 60, find the number of notes of each type.​

Answer 1

Answer:

₹ 10 = 24 notes            ₹ 20 = 36 notes

Step-by-step explanation:

Let the note of denomination 10 be $x$ and 20 be $y$.

x + y = 60

10x + 20y = 960

Eliminating x =>   x + y = 60   x  10 =>    10x + 10y = 600

10x + 10y = 600

- 10x + 20 y = 960

0 - 10y = -360      

-10y = -360                         y = 36

x + 36 = 60

x = 24