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Q.

The final marks in mathematics of 30 students are as follows:


53, 61, 48, 60, 78, 68, 55, 100, 67, 90, 75, 88, 77, 37, 84, 58, 60, 48, 62, 56, 44, 58, 52, 64, 98, 59, 70, 39, 50, 60.


Find the number of students who scored more than or equal to 90.


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a

3

b

4

c

5

d

9 

answer is A.

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Detailed Solution

The given data shows the final marks in mathematics of 30 students are as follows:
53, 61, 48, 60, 78, 68, 55, 100, 67, 90, 75, 88, 77, 37, 84, 58, 60, 48, 62, 56, 44, 58, 52, 64, 98, 59, 70, 39, 50, 60.
We need to find the number of students who scored more than or equal to 90.
The given data can be grouped as follows:
Question ImageLet the number of students who scored more than or equal to 90 be x.
From the table,
We know that 90, 98,  and 100 are the scores which are more than or equal to 90.
⇒x=3
Thus the number of students who scored more than or equal to 90 is 3.
Hence, the correct option is 1.
 
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