Home
Class 12
MATHS
The mean of n items is overline(X). If t...

The mean of n items is `overline(X)`. If the first item is increased by 1, second by 2 and so on, then the new mean is

A

`bar(x) + n`

B

`bar(x) + (n)/(2)`

C

`bar(x) + (n+1)/(2)`

D

`bar(x) + (n+1)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

The mean of 11 items overline(X) . If first item is increased by 1, second item by 2 and so on, then new mean becomes lamda more than overline(X) and lamda is

The mean of n observations is X . If the first item is increased by 1, second by 2 and so on, then the new mean is (a) X +n (b) X +n/2 (c) X +(n+1)/2 (d) None of these

The mean of n items is bar(x) . If the first item is increased by n, second by n-1 and so on and last by 1, then the new mean is

The mean of n observation is barX . If the first observation is increased by 1^(2) , second by 2^(2) and so on, then the new mean is

The mean of a set of numbers is overline(X) . If each number is divided by 3, then the new mean is

If each of n numbers x_(i)=i , is replaced by (i+1)x_(i) , then the new mean is

Mean of a set of numbers is bar(x) . If each number is increased by lambda , then the mean of new set is

The mean weight of 9 items is 15. If one more item is added to the series the mean becomes 16. The value of 10th item is (a) 35 (b) 30 (c) 25 (d) 20

Let bar(x) and M.D be the mean and the mean deviation about bar(x) of n observations x_(p) , i=1, 2 . . . . . n . If each of the observation is increased by 5, then the new mean deviation about the new mean, respectively are .

The median and S.D. of a distribution are 20 and 4 respetively. If eahc item is increased by 2, the new median and S.D. are