Samantha has 30 coins, consisng of 25 paise and 10 paise, which total

1.	Samantha has 30 coins, consisng of 25 paise and 10 paise, which total Rs. 5.70. How many of each does she have?
Answer» Answer: There are 18 , 25-paise coins and 12 , 10-paise coins Step-by-step explanation: let the no. of 25paise coins = X and no. of 10 paise coins = y given, x + y = 30 -------------- (1) => y = 30-x ----------(2) also given, 25X + 10y = 570 (paise) => 25x + 10(30-x) = 570 => 25x + 300 - 10x = 570 => 15x = 570-300 => 15x = 270 => x = 270/15 => x = 18 so, (2) => y = 30-18 => y = 12 verification, 25(18) + 10(12) = 450 + 120 = 570 paise = Rs. 5.70 hence verified

Samantha has 30 coins, consisng of 25 paise and 10 paise, which total Rs. 5.70. How many of each does she have?

Answer»

Answer:

There are 18 , 25-paise coins and

12 , 10-paise coins

Step-by-step explanation:

let the no. of 25paise coins = X

and no. of 10 paise coins = y

given, x + y = 30 -------------- (1)

=> y = 30-x ----------(2)

also given, 25X + 10y = 570 (paise)

=> 25x + 10(30-x) = 570

=> 25x + 300 - 10x = 570

=> 15x = 570-300

=> 15x = 270

=> x = 270/15

=> x = 18

so, (2) => y = 30-18

=> y = 12

verification,

25(18) + 10(12)

= 450 + 120

= 570 paise

= Rs. 5.70

hence verified