UPSKILL MATH PLUS

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3. Example Problem III - Assumed mean method

Find mean by assumed mean method.

Class interval	$10-25$	$25-40$	$40-55$	$55-70$	$70-85$	$85-100$
Number of students	$2$	$3$	$7$	$6$	$6$	$6$

The mean of the data is .

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