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If x1, x2, x3,....xn are n values of a v...

If x1, x2, x3,....xn are n values of a variable X such that Find the value of n and the mean.

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If x_1,x_2,.......,x_n are n values of a variable X such that sum_(i=1)^n (x_i-2)=110 and sum_(i=1)^n(x_i-5) =20. Find the value of n and the mean.

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RD SHARMA-MEASURES OF CENTRAL TENDENCY-All Questions
  1. The mean of 5 number is 18. If one numbers is excluded, their me...

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  2. If the mean of five observations x , x + 2 , x + 4 , x + 6 , x + 8...

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  3. If x1, x2, x3,....xn are n values of a variable X such that Find the ...

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  4. The sum of the deviations of a set of  values  measured from  and th...

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  5. If the heights of 5 persons are 140cm, 150cm, 152cm, 158cm and 161c...

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  6. Find the mean of 994, 996, 998, 1002 and 1000

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  7. Find the mean of first five natural numbers.

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  8. Find the mean of all factors of 10.

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  9. Find the mean of first 10 even natural numbers.

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  10. Find the mean of x, x+2, x+4, x+6, x+8

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  11. Find the mean of first five multiples of 3.

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  12. Following are the weights (in kg) of 10 new born babies in a hospit...

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  13. The percentage of marks obtained by students of a class in mathemat...

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  14. the numbers of children in 10 families of a locality are: 2, 4, 3, 4...

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  15. If  is the mean of  prove that

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  16. Duration of sunshine (in hours) in Amritsar for first 10 days of Aug...

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  17. Explain, by taking a suitable example, how the arithmetic mean alter...

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  18. The mean of marks scored by 100 students was found to be 40. Later o...

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  19. The traffic police recorded the speed (in km/hr) of 10 motorists as ...

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  20. The mean of five numbers is 27. If one number is excluded, their me...

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