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The average of n numbers x(1),x(2),x(3) ...

The average of n numbers `x_(1),x_(2),x_(3) . . . . .. ,x_(n)` is A. If `x_(1)` is replaced by `(x+a)x_(1),x_(2)` is replaced by `(x+a)x_(2)` and so on. Find the new average.

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The correct Answer is:
`(x+a)A`
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ICSE-MEAN AND MEDIAN-Exercise 19(C)
  1. The average of n numbers x(1),x(2),x(3) . . . . .. ,x(n) is A. If x(1)...

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  2. The heights (in cm) of the volley-ball players from team A and term B ...

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  3. Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if ...

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  4. Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if ...

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  5. Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if ...

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  6. Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if ...

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  7. Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if ...

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  8. The mean of 18,24,15, 2x+1 and 12 is 21. Find the value of x.

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  9. The mean of 6 numbers is 42. If one number is excluded, the mean of re...

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  10. The mean of 10 numbers is 24. If one more number is included, the new ...

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  11. The following observations have been arranged in acending order. If th...

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  12. The following observations have been arranged in ascending order. If t...

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  13. Find the mean of the following data : 30,32,24,34, 26,28, 30, 35, 33...

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  14. Find the mean of the following data : 30,32,24,34, 26,28, 30, 35, 33...

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  15. Find the mean and median of the data : 35, 48, 92, 76, 64, 52, 51, 6...

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  16. The mean of x,x+2,x+4,x+6 and x+8 is 11, find the mean of the first th...

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  17. Find the mean and median of all the positive factors of 72.

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  18. The mean weight of 60 students in a class is 40 kg. The mean weight of...

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  19. The average of n numbers x(1),x(2),x(3) . . . . .. ,x(n) is A. If x(1)...

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  20. The heights (in cm) of the volley-ball players from team A and term B ...

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