Question

answer the following question.

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Answer 1

Answer:

Option (B) it's your answer

Step-by-step explanation:

Hope this may be help you

Answer 2

Answer:

your solution is as follows

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Step-by-step explanation:

so basically the given formula is for finding mean using step deviation method

so for that calculating u mean is necessary which is calculated as

u=xi-A/h

where

xi=class mark of respective class

A=assumed mean(class mark of middleman class)

h=class width

Hence option C is correct