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OpenStudy (anonymous):
A group of students is donating blood during a blood drive. A student has a 9/20 probability of having type O blood and a 2/5 probability of having type A blood. Why are the events "type O" and "type A" blood mutually exclusive?
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OpenStudy (anonymous):
Can you have two types of blood at the same time?
OpenStudy (kropot72):
Two events are 'mutually exclusive' if it is impossible for them to happen together.
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