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The mean of 200 items was 50. Later on, ...

The mean of 200 items was 50. Later on, it was discovered that two items were misread as 92 and 8 instead of 192 and 88. Find the correct mean.

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`50*9`
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The mean of 200 items was 50. Later on, it was discovered that the two items were misread as 92 and 8 instead of 192 and 88. Find the correct mean.

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The mean of 100 observations was found to be 30. If two observations were wrongly taken as 32 and 12 instead of 23 and 11, find the correct mean.

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ICSE-MEAN AND MEDIAN-Exercise 19(A)
  1. If the mean of observations x,x+2,x+4,x+6 and x+8 is 11, find the mea...

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  2. The mean of 100 observations is 40. It is found that an observation 53...

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  3. The mean of 200 items was 50. Later on, it was discovered that two ite...

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  4. Find the mean of 75 numbers, if the mean of 45 of them is 18 and the m...

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  5. The mean weight of 120 students of a school is 52*75 kg. If the mean w...

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  6. The mean marks (out of 100) of boys and girls in an examination are 70...

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  7. Find x, if 9,x,14,18,x,x,8,10 and 4 have a mean of 11.

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  8. In a series of tests, A appeared for 8 tests Each test was marked out ...

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  9. Find the mean of 43, 51, 50, 57 and 54.

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  10. Find the mean of first six natural numbers.

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  11. Find the mean of first ten odd natural numbers.

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  12. Find the mean of all factors of 10.

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  13. Find the mean of x+3,x+5,x+7,x+9 and x+11.

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  14. If different values of variable x are 9*8,5*4,3*7,1*7,1*8,2*6,2*8,8*6,...

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  15. If different values of variable x are 9*8,5*4,3*7,1*7,1*8,2*6,2*8,8*6,...

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  16. The mean of 15 observations is 32. Find the resulting mean, if each ob...

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  17. The mean of 15 observations is 32. Find the resulting mean, if each ob...

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  18. The mean of 15 observations is 32. Find the resulting mean, if each ob...

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  19. The mean of 15 observations is 32. Find the resulting mean, if each ob...

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  20. The mean of 15 observations is 32. Find the resulting mean, if each ob...

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