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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.

If $40$ is the pass mark how many have failed?

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answer is B.

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Detailed Solution

It is given that, a data of marks scored by 30 students.
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.
From the observation, the first group I consists of the marks from

, the second group contains from

and proceed like this to form the table.
Group the students who scored the particular interval of marks and form a table.
Question Image

From the table, we can observe that,

2

students scored below

40

marks.
Hence, option 2) is correct.

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