Question

hey guys....
plz help me in this...
if it's rough it's also it's ok
plz help me.....

Answer 1

a) 24
b) 150
Hope my answers help you.
Mark class interval on x axis and frequency on y axis.
Frequency can be written in the form 2,4,6,8,etc.
If you need to draw through the center point of each line you can do that.