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2 February, 16:48

The following box contains 9 letters shown. The letters are drawn one by one without replacement and the result are recorded in order.

find the probabilty of the outcome Professor

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  1. 2 February, 16:54
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    These are 8 independent events

    P (P) = 1/9

    P (r) = 2/8

    P (o) = 2/7 and so on until only r is left

    These probabilities are multiplied together to give the resulting p (Professor)

    So it will be 1/9 * 1/4 * 2/7 * 1/6 * 1/5*1/2*1/3 * 1/2 = 2 / 90,720 = 1/45,360
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