Advertisements
Advertisements
Question
The mean of 15 observations is 32. Find the resulting mean, if the observation is: Decreased by 20%
Advertisements
Solution
Given that the mean of 15 observations is 32
resulting mean decreased by 20%
= 32 - `( 20 ) / (100 ) xx 32 `
= 32 - 6.4
= 25.6
APPEARS IN
RELATED QUESTIONS
Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if the observations, given above, be: multiplied by 3 and then divided by 2.
Find the median of: 25, 16, 26, 16, 32, 31, 19, 28 and 35
The mean of 10 numbers is 24. If one number is included, the new mean is 25. Find the included number.
For the set of numbers given below, find mean: 5, 7, 8, 4, 6
The weight of the seven members of a family, in kilograms are given below:
20, 52, 56, 72, 64, 13, 80.
Find mean weight.
A boy scored the following marks in various class tests during a terminal exam, each test being marked out of 20.
17, 15, 16, 7, 10, 14, 12, 19, 16, 12
Find his average mean marks.
The marks obtained by 10 students are listed below:
2, 5, 3, 8, 0, 9, x, 6, 1, 8
If the mean marks is 5, find x.
In History project, marks out of 20 were awarded to 8 students. The marks were as shown below:
14, 16, 18, 14, 16, 14, 12, 16
Find the mean marks.
The mean of 16 natural numbers is 48. Find the resulting mean, if each of the number is multiplied by 4
The mean of 4 observations is 20. If one observation is excluded, the mean of the remaining observations becomes 15. Find the excluded observation.
