The histogram below represents the Mathematics marks of the students.
Calculate the total number of students with total marks more than or equal to 20 and less than 60.

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Solution

The correct option is D 30
No. of students in marks interval 20-30 = 6

No. of students in marks interval 30-40 = 9

No. of students in marks interval 40-50 = 7

No. of students in marks interval 50-60 = 8

$∴$ total no. of students having marks more than or equal to 20 and less than 60 = 6 + 9 + 7 + 8 = 30

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The marks (out of 10) obtained by 28 students in a mathematics test are listed as below:
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The histogram below represents marks of students in a Mathematics exam with passing marks as 30. For finding the number of failed students, what is the class interval that needs to be considered?

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The histogram below represents the Mathematics marks of the students. Calculate the total number of students with total marks more than or equal to 20 and less than 60.

The histogram below represents the Mathematics marks of the students.
Calculate the total number of students with total marks more than or equal to 20 and less than 60.