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Tabulation and Interpretation of Ungrouped Data

The class mar...

Question

The class mark for the class interval 70 - 80 is .

A

85

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B

75

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C

65

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Solution

The correct option is B 75
Class mark = $\frac{u p p e r c l a s s l i m i t + l o w e r c l a s s l i m i t}{2}$

= $\frac{70 + 80}{2}$
= $\frac{150}{2}$
= 75

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Q. The following information is regarding marks in English, obtained out of 80.

Find the class mark for the class 60 - 80.

Class Interval	Frequency
10-20	5
20-30	10
30-40	4
40-50	13
50-60	8
60-70	3
70-80	8
80-90	9
90-100	11

From the table above, identify the class interval for the fifth class.

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Tabulation and Interpretation of Ungrouped Data

Standard VIII Mathematics

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