Question: 4.17 Consider the following contingency table: B B A 10 30 A 25 35 What is the probability of a. A I B? b. A'

4.17 Consider the following contingency table:

B B
A 10 30
A 25 35

What is the probability of

a. A I B?

b. A' I B?

c. A I B?

d. Are events A and B independent?

4.18 If P(A and B) = 0.4 and P(B) = 0.8, find P(A I B).

4.19 If P(A) = 0.7, P(B) = 0.6, and A and B are independent, find P(A and B).

4.20 If P(A) = 0.3, P(B) = 0.4, and P(A and B) = 0.2, are A and B independent?

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