A boy spends 3/4 of his pocket money and then 4/5 of the remainder he gives to his sister. If he has Rs. 40 left, what did he have at first?
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Answer:
800 rupees
Step-by-step explanation:
let pocket money be = x
X-3/4x is amount remaining with him after spending money.
X-3/4x = x/4 (on solving)
now he gave 4/5 of remaining amount to his sister.
= x/4 - 4/5 of x/4
= x/4 - x/5
= x/20
amount remaining with him is =40
x/20=40
x=800
his pocket money is 800
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