Marks obtained by 40 students in a short assessment is given below where a and b are two missing data
|
Marks |
5 |
6 |
7 |
8 |
9 |
|
No. of students |
6 |
a |
16 |
13 |
b |
If the mean of the distribution is 7.2 then the values of the a and b respectively are:
1
1, 4
2
4, 1
3
5, 0
4
1, 5