The following information is regarding marks in English- obtained out of 80 -Find the class mark for the class 60-80- Class Interval Frequency 0-20 1 20-40 12 40-60 17 60-80 20 Total N -50 A- 60B- 80C- 75D- 70

The correct option is D 70We know that, nbsp;Class Mark = Lower Class Limit + Upper Class Limit/2 For the class interval '60 80', the lower class lim ...

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Standard IX

Mathematics

Class Mark

The following...

Question

The following information is regarding marks in English, obtained out of 80.
Find the class mark for the class 60 - 80.

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Solution

The correct option is D 70
We know that,
$C l a s s M a r k = \frac{L o w e r C l a s s L i m i t + U p p e r C l a s s L i m i t}{2}$

For the class interval '60 - 80', the lower class limit is 60 and the upper class limit is 80.

$∴ C l a s s M a r k = \frac{60 + 80}{2}$
= 70

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The following information is regarding marks in English, obtained out of 80. Find the class mark for the class 60 - 80.

The correct option is D 70We know that, ClassMark=Lower Class Limit+Upper Class Limit2 For the class interval '60 - 80', the lower class limit is 60 and the upper class limit is 80. ∴Class Mark=60+802 = 70

The following information is regarding marks in English, obtained out of 80.
Find the class mark for the class 60 - 80.

The correct option is D 70
We know that,
$C l a s s M a r k = \frac{L o w e r C l a s s L i m i t + U p p e r C l a s s L i m i t}{2}$

For the class interval '60 - 80', the lower class limit is 60 and the upper class limit is 80.

$∴ C l a s s M a r k = \frac{60 + 80}{2}$
= 70