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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. What is the probability that a student has type O or type A blood?
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OpenStudy (anonymous):
9/20 + 2/5 = your answer
OpenStudy (anonymous):
11 out of 25 if I'm not mistakeing
OpenStudy (anonymous):
@BestMathematician am I right?
OpenStudy (anonymous):
17/20
OpenStudy (anonymous):
Thanks guys :) @Best_Mathematician That's how I thought it was done... :)
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OpenStudy (anonymous):
:) okay @Best_Mathematician
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