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If A.M. and coefficient of variation of ...

If A.M. and coefficient of variation of x is 6 and 50% respectively, then variance of x is

A

a ) 7

B

b ) 9

C

c ) 3

D

d ) none of these

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UNITED BOOK HOUSE-Ramakrishna Mission Boys Home High School, Question Paper -Exercise
  1. Find the minimum value of sec^2theta +cos^2theta

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  2. Which of the following is correct?

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  3. If A.M. and coefficient of variation of x is 6 and 50% respectively, t...

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  4. If the number of educated persons is 65% of the population, then in pi...

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  5. Two variables x and y are related as y = 3 - 7x and Q1, Q3 of x are re...

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  6. Under what condition, the weighted average becomes identical to the si...

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  7. For a set of 20 observations A.M. is 4.0 and the coefficient of variat...

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  8. Determine the median of prime numbers between 50 and 82.

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  9. In a moderately skew distribution mode = 3. Median + k. mean then find...

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  10. Of 1 a 1 < 1 and 1 b 1 < 1 then show that 1a + b1 < |1 + ab|.

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  11. What do you mean by purchasing power of money?

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  12. What are the tests proposed by Fisher's for checking the goodness of a...

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  13. There are three children aged 3, 4 and 5 years in a room. If another 4...

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  14. The G.M of two numbers is 18. If by mistake one figure is taken as r^2...

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  15. How the median is affected all the original observations are increased...

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  16. Write two numbers with mean 10 and variance 4.

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  17. If two variables x and y be connected by the relation x = a + by then ...

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  18. Prove that the A.M of the reciprocal of two numbers can not be smaller...

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  19. If the sum of the squares of the differences of the 10 values of a var...

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  20. Find the A.M. of 0.5, 0.55, 0.555,…………….upto k-th term.

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