Question

15. The cost price of 16 pens is equal to the selling price of 12 pens. Find the gain or loss per cent.
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Answer 1

Answer:

Let 16 pens cost Rs.100. Hence 1 pen will cost 100/16.

SP of 12 pens = Rs.100. Hence SP of 1 pen = 100/12

Profit = 100/12 - 100/16= 800-600/96 or 200/96

Or 25/12.

Proit % = profit ÷ cp x 100 = 25/12 × 16/100 x100

= 100/3 or 33.33%

Answer 2

Answer:

Let CP of 1 pen be x.

.: CP of 16 pens=16*x =16x

GIVEN:

CP of 16 pens = SP of 12 pens.

.: SP of 12 pens=CP of 16 pens=16x.

.: SP of 1 pen=16x/12 =4x/3.

.: SP is greater than CP so its a gain.

.: Profit =SP-CP.

=4x/3-x.

=x/3.

.: Profit %=(Profit/CP)*100

=(x/3÷x)*100.

=(x/3*1/x)*100.

=100/3

=33.33%

.: Profit % is 33.33%.....

Step-by-step explanation:

HOPE THIS WILL HELP YOU:)