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Q24
Please help me as soon as possible.

Q24 Please help me as soon as possible.-example-1

1 Answer

3 votes

1/60

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We need to find the probability of sounding an alarm per second if we are talking about the alarm sounding exactly at the time the student enters the laboratory.

Since alarm sounds for 5 seconds every 5 minutes, the probability we are looking for is:

  • 5 seconds per 5 minutes =
  • 5 seconds per 300 seconds =
  • 5/300 =
  • 1/60
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