Study the pie chart and information given and answer the following question:
If there are 1150 students in a school who opted for sports as a hobby, how many students have a book reading as a hobby?

23% of the total students that is 1150 students opted for sports as a hobby.

Let the total number of students be x.

0.23 x=1150   

$\frac{23}{100}$x = 1150

So, x=5000

9% of x opted for book reading as a hobby,

= 9 % of 5000

=  $\frac{9}{100}$​× 5000 = 450

Therefore, 450 students will have book reading as a hobby.