Question: The joint probabilities shown in a table with two rows, A1 and A2, and two columns, B1 and B21, are as follows: P(A1 and B1)

The joint probabilities shown in a table with two rows, A1 and A2, and two columns, B1 and B21, are as follows: P(A1 and B1) = .10, P(A1 and B2) = .30, P(A2 and B1) .05, and P(A2 and B2)= .55. Then P(A1|B1), calculated up to two decimals, is? .67

.35

.65

.33

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