The median of marks of 9 student in a class are 34, 32, 48, 38, 24, 30, 27, 21, 35 is
30
32
34
38
The mean of 5 numbers is 18. If one number is excluded, their mean becomes 16, then the excluded number is
18
25
26
If in a moderately skewed distribution the value of mode and mean are 6 λ and 9λ respectively, then the value of the median is ______.
8 λ
7 λ
6 λ
5 λ
The mean age of the combined group of men and women is 25 years. If the mean age of the group of men is 26 and
that of the women is 21, then the percentage of men and women in the group is
60, 40
80, 20
20, 80
40, 60
The median of the daily wages of ten worker in Rs. 20, 25, 17, 18, 8, 15, 22, 11, 9, 14 is
15
16
17
The variance of first n natural numbers is
The mean of first n - natural number is
n/2
One of the method of determining mode is
Mode = 2 median - 3 mean
Mode = 2 median + 3 mean
Mode = 3 median - 2 mean
Mode = 3 median + 2 mean
The means of the series 1, 2, 4, 8, - - - - 2n is
If in a frequency distribution, the mean and median are 21 and 22 respectively, then its mode is approximately?
20.5
22.0
24.0
25. 5
