# Question 3 & 4

**Question 3: A person has 180 pens out of which 9 are blue, What is percentage of blue pens ?**

**FPSC AD IB 2017**

**Solution: **

This is question asking percentage of some pens from a collection of pens!

To solve this we should understand Percentage !

*visit this link as well for percent formula*

*Lets suppose 9 is ‘x’ percent of 180*

i-e

**Question 4: A student got 68 marks, which are 85% of total marks. How many total marks are there ?**

**FPSC AD IB 2017**

**Solution: **

Lets suppose total marks = x

Now because the boy got 68 or 85 % marks from total marks ‘x’

it means

68 is 85 % of x

we cam write it as ;

So, total marks were 80