Find the value of the variable — task. Maths CBSE Mentoring Hindi, Class 10 Mentoring.

Determine the value of "\(a\)" if the mean of the following data is 20.

Class interval	\(5 - 10\)	\(10 - 15\)	\(15 - 20\)	\(20 - 25\)	\(25 - 30\)	\(30 - 35\)
Frequency	8	9	4	\(a\)	2	10

The value of the variable is

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5. Find the value of the variable