6.7, 6
7.6, 5
5.7, 87
34, 6
Correct answer is A
No of defective(x) | No of boxes (f) | fx |
4 | 2 | 8 |
5 | 7 | 35 |
6 | 17 | 102 |
7 | 10 | 70 |
8 | 8 | 64 |
9 | 6 | 54 |
∑ | 50 | 333 |
Mean=∑fx∑f
= 33350=6.66≊
The median is the average of the 25th and 26th position = 6.