Question

No. 10 & 11 please. Explain in steps. Do in form of linear equation. Do both sums please.

Answer 1

Step-by-step explanation:

(10)

Given total number of coins = 80

Let the number of Rs 2 coins be x

Therefore number of Rs 5 coins = (80 - x)

Total amount in the purse = Rs 232

=> 2x + 5(80 - x) = 232

=> 2x + 400 – 5x = 232

=> 400 - 232 = 3x

=> 168 = 3x

=> x = 56

Then,

80 - x = 80 - 56 = 24.

Therefore,

Number of 5 rupee coins = 24.

(11)

Let the number of Rs. 10 notes = x

Number of Rs. 50 notes = x - 1

Amount with Rs.10 notes = 10x

Amount with Rs.50 notes ​= 50(x - 1)

According to question,

=> 10x + ​50(x - 1) = 550

=> 10x + 50x = 600

=> 60x = 600

=> x = 10

Therefore,

Number of 50 coins = 9.

Hope it helps!