Question

By selling 125 books a man gains an

amount equal to the SP of 5 books find the

gain percent.

​

Answer 1

Answer:

let SP of one book be x

SP of 125 books = 125x

profit = SP of five books = 5x

CP of 125 books = SP - profit

= 125x - 5x

= 120x

profit percent = profit*100/CP

= 5x*100/120x

= 25/6%

1

=. 4 ---- %

6

Answer 2

His profit % is 4.16% by selling 125 books if the gain is equal to S.P. of 5 books.

Step-by-step explanation:

Let the Selling Price of 1 book be Rs. “x”.

Then,

S.P. of 125 books will be Rs. “125x”

S.P. of 5 books will be Rs. “5x”

It is given that the gain by selling 125 books will be equal to S.P. of 5 books, so

S.P. of 5 books = Gain = Rs. 5x

According to the question, we get

Gain = [S.P. of 125 books] – [C.P. of 125 books]

⇒ 5x = 125x - [C.P. of 125 books]

⇒ [C.P. of 125 books] = 125x – 5x

⇒ [C.P. of 125 books] = Rs. 120x

Thus,

The profit percent for the shopkeeper by selling 125 books will be,

= [(Gain)/(C.P.)] * 100

= [5x/120x] * 100

= 0.0416 * 100

= 4.16%

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