Fifteen items or less: The number of customers in line at a supermarket express checkout counter is a random variable wit following probability distribution. X 2 4 5 PO P(x) 0.05 0.25 0.30 0.20 0.10 0.10 Part: 0 / 4 0 Send data to Excel Part 1 of 4 1 (a) Find P (3). P(3) = X 3

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Q: P(A)=0.42P, (A)=0.42, P(B)=0.38, P(B)=0.38, and P(AandB)=0.20P(AandB)=0.20. P(B∣notA)=

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