Question

A boy spends of his pocket money and then⅘ of the remainder is given to his sister. If he has Rs.40 left. What did he have at first?

Answer is Rs.6

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Answer 1

Answer:

BTW your question is wrong, it is A BOY SPEND 3/4 OF HIS POCKET....

Step-by-step explanation:

Let the boy have x rupees

If he spend = 3x/4

Then remaining money he have = (x - 3x/4) = x/4

Now if he gave 4/5 of remaining money to his sister

That means he have (4/5)×(x/4) = x/5

So the remaining amount after all this is =

(x/4) - (x/5) =40

=> x/20 = 40

=> x = 800