A Statistics professor is teaching three sections of a statistics course, S1, S2 and S3 Of those in S1, 20% need special tutoring, whereas 10% in 52 need special tutoring and 30% of S3 need special tutoring. Suppose that 10% of at students are in 51, 60% are in 52 and 30% are in 53 (Give at least 3 decimal places) A) The probability that a randomly selected student need special tutoring is b) If a randomly selected student need special tutoring the probability that is from S1 is

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