Question

A man has only 20 paise coins and 25 paise coins in his purse. if he has 50 coins in all totalling rupees 11.25, how many coins of each does he have

Answer 1

Let no. of 20 paise coins is x and no. of 25 paise coins is y. Then by the given question,
x+y=50 --------------------(1) and
20x+25y=1125 [∵, Rs. 11.25=1125 paise]
or, 4x+5y=225 -----------(2)
Multiplying (1) with 4 we get,
4x+4y=200 ---------------(3)
Subtracting (3) from (2) we get,
y=25
Putting in (1)
x=50-y=50-25=25
∴, x=25, y=25
 

Answer 2

Answer:

x=25, y=25

Step-by-step explanation:

Let no. of 20 paise coins is x and no. of 25 paise coins is y. Then by the given question,

x+y=50 --------------------(1) and

20x+25y=1125 [∵, Rs. 11.25=1125 paise]

or, 4x+5y=225 -----------(2)

Multiplying (1) with 4 we get,

4x+4y=200 ---------------(3)

Subtracting (3) from (2) we get,

y=25

Putting in (1)

x=50-y=50-25=25

∴, x=25, y=25

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