Mathematics, 19.05.2020 01:58, lisacarter0804

£ represents 29 students in class
B represents students who have a brother
S represents students who have a sister
a) One student from the class is chosen at random. What is the probability that the student has a sister?
b)One of the students who has a brother is chosen at random. What is the probability that this student has a sister?

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£ represents 29 students in class
B represents students who have a brother
S represents...