Question

a survey of reading habits of 100 students showed that 30 read both comics and novels. 10 read neither comics nor novels and twice as many students read comics as read novels. 1. illustrate the information on a Venn diagram. 2. how many students read only novels. 3. how many students read comics. 4. how many students read only one type of book.

Answer 1

1. Attachment
2. We can use an equation for this
       100 students - both - nether = 60
         lets make x = novels, so comics is 2*x
60 = 2x + x
60 = 3x
x = 20      so 20 people read novels meaning:

3. That 40 people read comics (this can also be done by making x = comics and novels = x/2)

4. This just asks for total of comics only and novels only. We can add up our two previous values or be smart and know that we already calculated that sum as 60 [look back ;) ]