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Harmonic mean of 2, 4, 5 is…......

Harmonic mean of 2, 4, 5 is…...

A

4.21

B

3.16

C

2.98

D

None of these

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PATHFINDER-STATISTICS AND MATHEMATICAL REASONING-QUESTION BANK
  1. The mean of a set of number is increased by lambda, then mean of the n...

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  2. The geometric mean of number 7, 7^2, 7^3,…..,7^n is

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  3. Harmonic mean of 2, 4, 5 is…...

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  4. The number of runs scored by 11 players of a cricket team of school ar...

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  5. find the median of the following frequency distribution

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  6. Mode of the data 3,2,5,2,3,5,6,6,5,3,5,2,5 is

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  7. If the value of mode and mean is 60 and 66 respectively, then the valu...

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  8. The mean from the following data 340, 150, 210, 240, 300, 320 is

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  9. Marks of 5 students of a tutorial group are8, 12, 13, 15, 22 then vari...

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  10. In a binomial distribution mean is 4 and variance is 3, then find out ...

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  11. Prove that the statement -~(pharr q) harr {(p^^~q) vv (~p^^q)} is a ta...

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  12. Prove that [(p^^~q)vv(q^^~p)]^^(pvvq)=(pvvq)^^(~qvv~p)^^(pvvq)

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  13. Show that the argument "Unless we control population all advances resu...

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  14. If x, y, z be any three elements of a Boolean lattice, show that (x+...

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  15. Choose the correct answer: The hybridisation of the carbon atom (under...

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  16. Find the mean of 2,5,7 and 9

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  17. If overlinex is the mean of a set of n observations x1 , x2 , x3…..,xn...

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  18. If the mean of 3, 4, x, 7, 10 is 6 then the value of x is

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  19. Weight of 5 students is given as 54,44,47,65 and 51. Find the mean of ...

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  20. The Mean of a set of numbers is overlinex . If each number is incre...

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