Question

Find the class mark of the interval 15.7 – 25.7?​

Answer 1

$\underline{\pink{ Class \:mark:}}$

The average of upper and lower boundaries of given class.

$Given \: class \: interval \: 15.7 - 25.7$

$Lower \: boundary \:of \: class \: interval = 15.7$

$Upper \: boundary \:of \: class \: interval = 25.7$

$\red{ Class \: mark } = \frac{15.7 + 25.7}{2}$

$= \frac{41.4}{2}$

$= 20.7$

Therefore.,

$\red{ Class \: mark\: of \:class \:interval\: 15.7 - 25.7 }$

$\green { = 20.7}$

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Answer 2

Answer:

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