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There are 60 students in a class. The fo...

There are 60 students in a class. The following is the frequency distribution of marks obtained by the students in a test: Marks:, 0, 1, 2, 3, 4, 5 Frequency , `x-2` , `x` , `x^2` , `(x+1)^2` , `2x` , `x+1`. Determine mean and standard deviation of the marks.

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