Question

.Aruna has only Re 1 and Rs 2 coins with her. If the total number of coins that she has is 50 and the amount of money with her is Rs 75, then the number of Re 1 and Rs 2 coins are, respectively

Answer 1

Let number of ₹ 1 coins = x
and number of ₹ 2 coins = y
Now, by given conditions x+y=50 …(i)
Also, x×1+y×2=75
⇒ x + 2y = 75 …(ii)
On subtracting Eq. (i) from Eq. (ii), we get
(x + 2y) – (x + y) = 75 – 50
⇒ y = 25
When y = 25, then x = 25

Answer 2

Let number of re 1 coins is x
Let number of rs 2coins is 50-x

Therfore,
(1)x +2(50-x)=75
By solving,
x=25(re 1 coins)
and
50-x=25 (rs 2 coins )

Regards,
HARISARAN G