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  • Perplex
    IB Math AASL
    /
    Probability
    /

    Problem Bank

    [Maximum mark: 6]

    At a logistics hub two events are recorded for every shipment :

    • E : The shipment arrives at the hub on schedule.

    • F : The shipment leaves the hub on schedule.

    It is given that the chance a shipment arrives on schedule is ​60%, the chance a shipment leaves on schedule is ​80%, and the chance a shipment both arrives and leaves on schedule is ​50%.

    1. Show that events ​E​ and ​F​ are not independent.

      [2]
    2. Find ​P(E∩F′).

      [2]
    3. Given that a shipment arrives on schedule, find the probability it does not leave on schedule.

      [2]

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