Find the mean using direct method — task. Mathematics State Board, Class 9.

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Calculate the mean of the following observations using direct method.

Class interval	\(5 - 20\)	\(20 - 35\)	\(35 - 50\)	\(50 - 65\)	\(65 - 80\)	\(80 - 95\)	\(95 - 110\)	\(110 - 125\)
Frequency	18	4	3	23	17	13	7	4

The mean of the data is

(Note: If the answer is a whole number, write as it is. If not, round off the answer to \(2\) decimal places and provide the answer.)

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7. Find the mean using direct method