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No. defective per box 4 5 6 7 8 9 No. of boxes 2 7...

Mathematics
JAMB 1991

No. defective per box 4 5 6 7 8 9
No. of boxes 2 7 17 10 8 6

Find the percentage of boxes containing at least 5 defective bolts each

  • A. 96
  • B. 94
  • C. 92
  • D. 90
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Correct Answer: Option A
Explanation

% of boxes containing at least 5 defective bolts each

= \(\frac{7 + 17 + 10 + 8 + 6}{50}\)

= \(\frac{48}{50}\) x \(\frac{100}{1}\)

= 96%


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