Question

Find the classmark135to155

Answer 1

The class mark of 135-155 is
= (135+155)/2
= 290/2
= 145

Hence, the class mark of 135-155 is 145.

Answer 2

$class \: mark = \frac{135 + 155}{2} \\ \\ = \frac{290}{2} \\ \\ = 145$
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