Question

A merchant sold 5 pens and 3 pens for 75 rupees .Next day he sold 4 pens and 7 pencils for 83 rupees at the same rate .what is the cost of a pen? and a pencil?
​

Answer 1

Answer:

First day

5+3pens=8pens

75/8=9.375 is the cost of pen

Second day

4*9.375+7*x=83

37.5+7x=83

7x=83-37.5

7x=45.5

X=45.5/7

X=6.5

6.5 is the cost of pencil

Answer 2

the cost of one pen is=14 and pencil is=6.5

Step-by-step explanation:

first no.of pens=15

no.of pencils=7

rate of pens are 112.5

rate of pencils are 45.5

divide 112.5/15=14

45.5/7=6.5