Question

sara purchased 45 dozens of pens of Rs 3510.she sells 20 dozens at a profits of 15% and the remainig for 10% loss.what is her total loss or profit%.

Answer 1

45dozens for 3510 Rs.

45 = 3510

For 1 dozen = 78

20dozens = 78 × 20 = 1560

Profit is 15% then

15% × 1560 = 234

1560 + 234 = 1794

234 is profit

Remaining 25 dozens = 78 × 25 = 1950

Loss of 10% then

10% × 1950 = 195

234 - 195 = 39 add this to 3510 then it equals to
3549.(price sold).

195 is the loss.

Profit % formula is

(price sold - price purchased) ÷ price purchased.

Then we get

(3549 - 3510) ÷ 3510 =
0.11111

That is 1.1111% is the answer.


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