Mathematics
If the mean of observations x, x + 2, x + 4, x + 6 and x + 8 is 11, find the value of x.
Related Questions
The mean of 15 observations is 32. Find the resulting mean, if each observation is :
(i) increased by 3
(ii) decreased by 7
(iii) multiplied by 2
(iv) divided by 0.5
(v) increased by 60%
(vi) decreased by 20%
The mean of 5 numbers is 18. If one number is excluded, the mean of remaining numbers becomes 16. Find the excluded number.
12 observations in a data are written in ascending order. If the last (12th) observation is doubled, the median will increase by :
12
24
0
6
12 observations in a data are written in descending order. If the first observation is doubled, the median will :
remain same
increase by 12
decrease by 12
change by 12