Question

Rahul bought erasers at 60 a dozen. He sold it for 10
each. What is his profit per cent?​

Answer 1

Answer:

first 60 and dozen 12 so 10 each so 120 so 60×2=120 50 % profit

Step-by-step explanation:

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Answer 2

Answer:

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Step-by-step explanation:

Given total cost of 5 pens and 10 pencil = Rs 30

5 pens + 10 pencils = 30

pens + 2 pencils = 1

also given pen cost 3 more than a pencil

i.e, pen = 3 + pencil.

pen - pencil = 3

pens + 2 pencils = 6

_______________

-3 pencils = -3

pencils = 1

pen - 1 = 3

pen = 4

cost of pencils = 1    cost of pen = 4