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The mean of the following frequency tabl...

The mean of the following frequency table is 50, but the frequency `f_1`and `f_2` in classes 20 - 40 and 60 -80 respectively are not known. Find these frequencies.

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MBD-STATISTICS-Exercise
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  9. Find the mean marks of the following cummulative frequency table :

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  11. The following table gives the enrollment in higher secondary school in...

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  16. Calculate the arithmetic mean of the following distribution.

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  17. Calculate the mean of the following :

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  18. Find the mean of the following distribution :

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  19. Find the mean of the following data :

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  20. Calculate the arithmetic mean of the following distribution

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