1.

1). 15%2). 60%3). 65%4). 70%

Answer»

Let the C.P of 40 ARTICLES be x, hence the selling price of 25 articles is x.

The C.P of each ARTICLE = x/40

And the selling price of each article = x/25

Now, S.P = C.P + profit

⇒ x/25 = x/40 + profit

Hence, profit = x/25 – x/40

Profit = 3x/200

For a C.P of x/40, profit is 3x/200

Let profit % = y%

Hence, y% of x/40 = 3x/200

y/100 × x/40 = 3x/200

y = 3 × 40 × 100 /200 = 60



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