Question

lady has only 20 paisa coin and 25 paisa coins in her purse . if she has 50 coins in all totaling rs 11.50, how many copies of each kind does she have?​

Answer 1

$\Large\mathtt\green{ }\huge\underline\mathtt\red{Answer : }$

Let the number of 20 paise coins be x and the 25 paise coins be y. = > 20x + 25y = 1150. Given that she has 50 coins in total. = > x = 20.

______________________________

Answer 2

Answer:

Let x and y be the number of 50-paisa and 25-paisa coins respectively.

Then  x + y = 50 ……….(i) 

0.5x + 0.25y = 19.50 ………(ii) 

Multiplying (ii) by 2 and subtracting it from (i),

we get  0.5y = 50 - 39 

⇒ y = 11/0.5 = 22 

Subtracting y = 22 in (i),

we get  x + 22 = 50 

⇒ x = 50 – 22 = 28 

Hence, the number of 25-paisa and 50-paisa coins is 22 and 28 respectively