Mathematics
The mean of observations, given in the adjoining table, is 20, the value of a is :
| x | f | fx |
|---|---|---|
| 10 | 10 | |
| 20 | a | |
| 30 | 10 |
20
30
10
25
Related Questions
The mean of given observations is :
C.I. f 30-40 2 40-50 3 41
27
71
91
For data given in the adjoining table, the mean is :
C.I. f x u = (x - A)/i f × u 0-10 5 10-20 10 20-30 10 17
27
25
60
If the mean of the data given in adjoining table is 20, the relation between x1 and x2 is :
x f fx 10 x1 20 20 30 x2 x1 + x2 = 30
x1 - x2 = 15
x1 - x2 = 0
x1 + x2 = 20
The mean of data, represented by given diagram is :
53
47
42
51
