Mathematics, 25.12.2019 00:31 ariellencevallo
Among persons donating blood to a clinic, 85% have rh+ blood (that is, the rhesus factor is present in their blood.) six people donate blood at the clinic on a particular day.
a) fine the probability that at least one of the five does not have the rh factor.
b) find the probability that at most four of the six have rh+ blood.
c) the clinic needs six rh+ donors on a certain day. how many people must donate blood to have the probability of obtaining blood from at least six rh+ donors over 0.95?
Answers: 2
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