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There are 60 students in a class. The following is the frequency distribution of the marks obtained by the students in a test:

Marks 0 1 2 3 4 5
Frequency x-2 x x2 (x+1)2 2x x+1

where x is a positive integer. Determine the mean and standard deviation of the marks.

1 Answer

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Best answer

Sum of frequencies = 60

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