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Q5. Suppose that the four inspectors at a film factory are supposed to stamp the expiration date on
each package of film at the end of the assembly line. John, who stamps 20% of the packages, fails
to stamp the expiration date once in every 200 packages; Tom, who stamps 60% of the packages,
fails to stamp the expiration date once in every 100 packages; Jeff, who stamps 15% of the
packages, fails to stamp the expiration date once in every 90 packages; and Pat, who stamps 5%
of the packages, fails to stamp the expiration date once in every 200 packages. If a customer
complains that her package of film does not show the expiration date, what is the
it was inspected by John?
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