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OpenStudy (anonymous):
Can someone explain how to solve this? Will medal.
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OpenStudy (anonymous):
Mrs. Jones surveys her class about their siblings. In the class, 75% of the students have a brother, 82% have a sister, and 65% have both a brother and a sister. What is the probability that a student has a brother or a sister?
OpenStudy (dtan5457):
P(Brother 0r Sister)= .75 + .82 - .65 92%
OpenStudy (anonymous):
Ok. Why would you subtract the 65%? Just curious. @dtan5457
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