HELP.The grades students scored on the most recent math exam are shown on the histogram below. How many students took the exam? A. 100 B. 85 C. 95 D. 90

Answer:
To find out how many students took the exam you would add up how many students there was between each bar line.
First barline=5
Second barline=15
Third barline= 10
Fourth barline= 25
Fifth barline= 20
Last barline=15
When you add up all these numbers you get:
5+15+10+25+20+15=90
Therefore; you have 90 students who took the math exam.