Fifty boxes each of 50 bolts were inspected for the number which were defective. The
MATHEMATICS
JAMB 1991
Fifty boxes each of 50 bolts were inspected for the number which were defective. The following was the result
\(\begin{array}{c|c} \text{No. defective per box} & 4 & 5 & 6 & 7 & 8 & 9 \\ \hline \text{No. of boxes} & 2 & 7 & 17 & 10 & 8 & 6\end{array}\)
Find the percentage of boxes containing at least 5 defective bolts each
- A. 96
- B. 94
- C. 92
- D. 90
Correct Answer: A. 96
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