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Q.

In a mathematics test, the following marks were obtained by 40 students of class VI:


8, 1, 3, 7, 6, 5, 5, 4, 4, 2, 4, 9, 5, 3, 7, 1, 6, 5, 2, 7, 7, 3, 8, 4, 2, 8, 9, 5, 8, 6, 7, 4, 5, 6, 9, 6, 4, 4, 6, 6.


Find how many students obtained marks below 4.


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a

6

b

8

c

15

d

7 

answer is B.

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Detailed Solution

The given data shows the marks obtained by 40 students of class VI in a mathematics test:
8, 1, 3, 7, 6, 5, 5, 4, 4, 2, 4, 9, 5, 3, 7, 1, 6, 5, 2, 7, 7, 3, 8, 4, 2, 8, 9, 5, 8, 6, 7, 4, 5, 6, 9, 6, 4, 4, 6, 6.
We need to find how many students obtained marks below 4.
Frequency distribution table for the given data will be as follows:
Question ImageLet the number of students who obtained marks below 4 be x.
From the frequency distribution table,
⇒x=2+3+3
⇒x=8
Thus, 8 students obtained marks below 4.
Hence, the correct option is 2.
 
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