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23 February, 19:38

If the probability that a student is on-time to class is 0.1 and the probability he is on-time or marked tardy on the attendance roster is 0.9, what is the probability he will be marked tardy if the events on-time and marked tardy are mutually exclusive? If A and B are independent?

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  1. 23 February, 19:56
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    T Tardy - Student tardy for less than 30 minute with no valid excuse. W See Unexcused Absences (above). Z Excused Tardy - Student tardy to class but with an acceptable explanation, i. e. doctor/dentist.
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