SOLUTION: Hi I hope someone can help with providing the answer and how did you arrive with that answer. Thank you in advance Two students are registered for the same class and attend indepe

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Question 861766: Hi I hope someone can help with providing the answer and how did you arrive with that answer. Thank you in advance
Two students are registered for the same class and attend independently of each other, student A 80% of the time and student B 70% of the time. The teacher remembers that on a given day at least one of them is in class. What is the probability that student A was in class that day? (Round your answer to three decimal places.)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

P(at least one) = 1 -P(neither) = 1-.06 = .94    Note: .2*.3 = .06

P(at least one and is A) = .94*.8 = .752