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The following table shows the marks distribution among the students in a class. How many students scored less than 20 marks?
Question

The following table shows the marks distribution among the students in a class.

How many students scored less than 20 marks?

A.

5

B.

7

C.

2

D.

6

Correct option is A

cumulative frequency: The total of frequencies, that are distributed over different class intervals

calculation: 

the students who scored less than 20 marks  = 5

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