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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