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The mean of 25 observations is 36. Out o...

The mean of 25 observations is 36. Out of these observationsif the mean of first 13 observations is 32 and that of the last 13 observations is 40, the 13th observation is :

A

23

B

36

C

38

D

40

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MODERN PUBLICATION-STATISTICS-EXERCISE
  1. The mean of 100 observations is 50. If one of the observations which w...

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  2. There are 50 numbers. Each number is subtracted from 53 and the mean o...

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  3. The mean of 25 observations is 36. Out of these observationsif the mea...

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  4. The median of the data 78, 56, 22, 34, 45, 54, 39, 68, 54, 84 is

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  5. Median of the following numbers : 4, 4, 5, 7, 6, 7, 7, 12, 3 is

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  6. Mode of the data 15, 14, 19, 20, 14, 15, 1 6, 14, 15, 18, 14, 19, 15, ...

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  7. For drawing a frequency polygon of a continuous frequency distribution...

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  8. If the mean of x and 1/x is M, then the mean of x^2 and 1//x^2 is

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  9. The mean of the ungrouped data is given by

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  10. The mean of xi and x2 is M1 and that of x1,x2,x3,x4 is M2. Then the me...

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  11. If M and Mg represents the mean of the raw and grouped data, respectiv...

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  12. The mean of the cubes of the fist n natural number is

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  13. The mean of first 10 natural numbers is

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  14. The average age of a group of eight is same as it was 3 years ago, whe...

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  15. The arithematic mean of 6,10,x and 12 is 8. the value of x is

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  16. The mean age of combined groupd of men and women is 25 years. If the m...

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  17. If barx1,barx2,barx3,….., barxn are the means of n groups with n1,n2,…...

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  18. The mean of x1,x2 is 6 and mean of x1,x2,x3 is 7, find the value of x3

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  19. Find the median of the following data: 12,11,6,7,10,17,9,15,13

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  20. Find the missing frequency k from the following data if mean is 16.​

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