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The A.M. of 20 frequencies is 30. At the...

The A.M. of 20 frequencies is 30. At the time of verification it was found that two frequencies were wrongly written as 27 and 30 instead of 31 and 38. Find the correct A.M.

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The correct Answer is:
30.5
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CHHAYA PUBLICATION-Measures of Central Tendency -Exercise 2 A Very short answer type question
  1. If a variable x assumes two values 10 and 15 having same frequency fin...

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  2. If three values of a variable are 4,5,7 and their frequencies are p-2,...

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  3. In a binomial distribution mean is 4 and variance is 3 then find the m...

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  4. The average mark obtained by 100 students is 40. But is was later foun...

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  5. The A.M. of 20 frequencies is 30. At the time of verification it was f...

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  6. If overline(x)=20, find overline(y), where (i) y=3x-15, (ii) y=2x+7

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  7. Find the A.M. of the following frequency distribution :

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  8. The no. of goals scored by a football team in the last 20 matches is g...

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  9. The mean of the following frequency distribution is 117 pound. Find th...

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  10. The marks obtained by 30 students in subject is given below. Find A.M.

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  11. The dialy income of a group of people is given is given below. Find th...

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  12. Find the mean of the following distribution.

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  13. The frequency distribution of marks obtained by 100 students in an exa...

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  14. The A.M. of the following frequency distribution is 72.5 , find the va...

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  15. Find the missing frequencies from the following table. Given that A.M....

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  16. Certain part of a frequency distribution is given, its mean is 1.46. F...

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  17. Out of total population in a certain town in South Africa, 60% are Bla...

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  18. The mean age of a combined group of men and women is 30 years. If the ...

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  19. The mean weight of 150 students of a class is 38 kg. If mean weight of...

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  20. The mean of 100 numbers is 55. IF the mean of the 40 numbers is 61, fi...

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