Question

' If a bag there are 42 coins from 50p 25p 10p and thus . total is 930 rubeus. If the fraction of both coins 25p and 50p is 3:1 then find how many coins for lop are there? ​

Answer 1

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Let no. of 25 paise coins be x. Then the number of 1 rupee coins are 3x

Let the number of 50 paise coins =y

Total number of coins =42

Total amount = Rs. 930

Now,

0.25x+0.5y+3x=3.25x+0.5y=930...(1)

Total number of coins,

x+3x+y=42

4x+y=930..(2)

Multiply equation (1) by 2 and subtract from equation (2)

6.5x+y−4x−y=320−930

2.5x=100

x=40

Putting the value of x=40 in equation (2)

$(4 \times 40) + y = 220$

$160 + y = 220$

y = 60

∴ Number of coins of 50 paise coins =60

hope its help u