The bar chart shows the distribution of marks in a class test. How many students took the test?
A.
15
B.
20
C.
25
D.
30
Correct answer is B
Number f students that took the test = \(\sum f\). Where f is the frequencies
= 2 + 5 + 0 + 3 + 4 + 0 + 0 + 2 + 3 + 1 + 2 = 20