The bar chart shows the distribution of marks in a class ...
The bar chart shows the distribution of marks in a class test. How many students took the test?
15
20
25
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
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