A survey asked a group of students to list their eye color. The results of the survey are shown in the graph.
Based on the graph, how many more students in a class of 300 students would be expected to have green eyes than blue eyes?
A) 10
B) 20
C) 50
D) 90
www.usatestprep.com/modules/gallery/files/216/21624/21624.JPG
here is the graph
The graph shows 30 greens and 20 blues.
Is that % of total?
Assuming %, then 300(0.30-0.20) = ?
That's not one of the choices, so you must somehow relate the data in the graph to the size of the sample.
If it's just the raw data, then 30-20 = 10
But the graph only accounts for 60 people, so that's not many out of 300 asked.