Question

In my pocket there are rs. 25 consisting of only the denomination of 20p and 50p. there are total 80 coins in my pocket. The number of coins of the denomination of 50 paise.?
(easy method)

Answer 1

30 fifty Paise coins and 50 twenty Paise coina are present....Feels the only easiest way to solve the sum...

Answer 2

Answer:

Total number of 50 p coins = 30

Step-by-step explanation:

Let number of 20 p coins be x and number of 50 p coins be y

Total number of coins in the pocket = 80

⇒ x + y = 80

⇒ x = 80 - y ..........(1)

Total amount of money = Rs. 25

⇒ 0.20x + 0.50y = 25

⇒ 2x + 5y = 250

Now, Putting value of x from equation (1)

⇒ 2(80 - y) + 5y = 250

⇒ 160 - 2y + 5y = 250

⇒ 3y = 90

⇒ y = 30

Now, Putting y = 30 in equation (1)

⇒ x = 80 - 30

⇒ x = 50

Therefore, Total number of 50 p coins = 30