The mean of prime numbers between 20 and 30 is:
The prime numbers between 20 and 30 is 23 , 29.
Mean of 23 and 29 = ( 23 + 29) / 2
= 52 / 2
= 26
The arithmetic mean of 30 values is 69. New mean, if each of the 30 values is increased by 5 is
In an examination, ten students scored the following marks: 60, 58, 90, 51, 47, 81, 70, 95, 87, 99. The range of this data is
Difference between the maximum & minimum value of the observation is called as range.
So, 99-47=52
If the number of observations in a data set is 25 and the mean of the data is 32. Then, the sum of all observations is ____________
If the mean of 6, 4, 7, x and 10 is 8, the value of x is
Mean = sum of all obs. /no. of obs.
8 = 6+4+7+x+10/5
40 = 27 +x
13 = x
The maximum frequency 10 is for the observation 4. Hence the mode of the data is
Median of the data 5, 9, 8, 6, 3, 5, 7, 12, 15 is
Find median of following data: 83, 37, 70, 29, 45, 63, 41, 70, 34, 54
Arranging the data in ascending order, we have:
29, 34, 37, 41, 45, 54, 63, 70, 70, 83
Here, the number of observations, n = 10 (Even).
Hence, the median of the given data is 49.5.
What will be the mean of x, x + 2, x + 4, x + 6, x + 8, where the value of x is 12?
The median of observations 17, 18, 20, 22, x+2, x+4, 31, 35, 37 is found to be 24. If the observations have been arranged in ascending order, the value of x will be
Doc | 1 Page
Video | 09:23 min
Doc | 4 Pages
Doc | 34 Pages
Test | 10 questions | 10 min
Test | 10 questions | 10 min
Test | 40 questions | 40 min
Test | 40 questions | 40 min
Test | 40 questions | 40 min