engineering recuitment ICAR Technician 2021 Mock Test (Re-Exam) Quantitative Aptitude Elementary Statistics
The frequency distribution of diameter (D) of 101 steel balls is given in the following list-
|
D(mm) |
43 |
44 |
45 |
46 |
47 |
48 |
|
No. |
13 |
15 |
22 |
21 |
16 |
14 |
find the mean of the diameter in mm
1
45.4
2
45.5
3
45.7
4
45.6