Answer:
D .37
D.16
Step-by-step explanation:
AS you can see in the histogram, 8 students scored between 0-10 points, 4 students scored between 10-20, 6 students scored between 20-30, 10students scored between 30-40, and 9 students scored between 40-50, if you add up all the students the answer to the first question is 37 students took the test.
The second question, how many students scored between 20-40?, you just add the 6 students that scored between 20-30, with the 10 students that scored between 30-40, and the answer is 16 students scored between 20-40.