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Mathematics, 04.04.2020 04:00 tia5520

Four individuals have responded to a request by a blood bank for blood donations. None of them has donated before, so their blood types are unknown. Suppose only type O is desired and only one of the four actually has this type. If the potential donors are selected in random order for typing, what is the probability that at least three individuals must be typed to obtain the desired type

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Four individuals have responded to a request by a blood bank for blood donations. None of them has d...

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