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If the mean of x and (1)/(x) is M,the me...

If the mean of `x` and `(1)/(x)` is `M`,the mean of `x^(3)` and `(1)/(x^(3))` is

A

`(M(M^(2)-3))/2`

B

`M(4M^(2)_3)`

C

`M^3`

D

`M^3+3`

Text Solution

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The correct Answer is:
B
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MCGROW HILL PUBLICATION-STATISTICS -MULTIPLE CHOICE QUESTIONS
  1. If the mean of x(1) and x2 is M1 and that of x1,x2, x3, x4 is M2 , t...

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  2. 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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  3. If the mean of x and (1)/(x) is M,the mean of x^(3) and (1)/(x^(3)) is

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  4. In an examination, a candidate scores the following percentage of mark...

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  5. If the standard deviation for the marks obtained by a student in month...

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  6. Mean of Ungrouped data

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  7. If the variable takes values 0,1,2,…, n with frequencies q^(n),""^(n)C...

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  8. The average monthly income of a four members of a family is Rs 610.25,...

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  9. The mean of x(1) andx2 is M1 and that of x1, x2, x3 ... x4 is M, the...

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  10. If M and M(g) represents the mean of the raw and grouped data, respe...

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  11. The mean of x(1),x(2)....... x(50) is M, if every xị, i = 1, 2 ..... 5...

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  12. If the first five elements of the set x(i) +5, i = 1, 2, 3 ..... 5 an...

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  13. The mean of the cubes of the first n natural numbers is

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  14. If M= (x(1)+x(2).....+x(20))/(20) then the value of sum(i=1)^20((xi-...

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  15. Arithmetic mean of first n natural numbers is "".

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  16. The arithmetic mean of the squares of the first n natural numbers is

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  17. A school has "20" teachers,one of them retires at the age of 60years a...

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  18. The mean of the following distribution is {:("Class",0-5,5-10,10-15...

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  19. The ages (in years) of a family of 6 members are 1, 5, 12, 15, 38 and ...

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  20. The mean of the series a, a + d, a + 2d, …, a + 2 nd, is

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