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
jamb 1991mathematics

The correct answer is A. 96

From the given data, we can see that there are 7 + 17 + 10 + 8 + 6 = 48 boxes containing at least 5 defective bolts each. Since there are a total of 50 boxes, the percentage of boxes containing at least 5 defective bolts each is (48 / 50) * 100% = **96%**. This corresponds to answer choice **A*

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