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  • The class mark of the class 90-120 is : (A) 90 (B) 105 (C) 115 (D) 120

The class mark of the class 90-120 is :

(A) \; 90

(B) \; 105

(C) \; 115

(D) \; 120

Answers (1)

Answer: B

Classmark is the mid-value or the central value of a class

It is calculated as follows:

 \frac{\text {upper limit + lower limit}}{2}

\Rightarrow  Class\ mark=\frac{90+120}{2}=\frac{210}{2}=105

The class mark of class 90-120 is 105 i.e. option B

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