Data Interpretation - Table Charts - Discussion

@Rajesh.

You are correct and the given answer also correct because in the question given that 30 and above means the number of student get 40 and above also included in 30 and above.

And observe that the number of students values goes to decrease in the order (0 and above), (10-and above), (20-and above).

So the number of student obtained 30 and above aggregate marks is 27 and number of students obtained marks 30 and above are 21 in chemistry.

The difference is 27-21 = 6.

But if a guy got marks above 40 means obviously he got above 30.

So, No.of students above 30 = above 30+above 40 = 21+4 = 25;

No.of students above 30 in aggregate = above 30+above 40 = 27+7 = 34;

==> 34-25=9, So 9 is right answer.

In the question, it is given that 30 as the cut-off mark which means 30 and above but if we take the range 40 and above then no of the students who obtained the exact 30 may not fall under the 40 and above category.

6 is the right answer because the students scoring higher marks are included in 21 and 27. If they hadn't been included the total would have been 100 after adding the students of all the categories.

No.of students scoring 30 and above marks in Chemistry = 27 how?

Number of students scoring 30 and above marks in aggregate = 21 how?

30 and above average aggregate (chem and physics is 27).

We want difference in chemistry only which is 21.

So 27-21 is 6.

If cut-off point is above 30.

Why only taken as above 30. And why not above 40 is also added?

Anyone, please explain.

No, 30 and above means (30-50) marks. So (40-50) are also included in the (30-50). 6 is the right answer.

No.of student above 30 are 21.

No.of student scoring 30 and above is 27.

So difference is 27-21 = 6.

6 is the correct answer. Because 30 above means included 40 to 50. So we don't need re-added 40 above.