SOLUTION: If P(A) = 0.4, P(B) = 0.7, and A and B are independent, find P(A or B) Please help

SOLUTION: If P(A) = 0.4, P(B) = 0.7, and A and B are independent, find P(A or B) Please help

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Question 949058: If P(A) = 0.4, P(B) = 0.7, and A and B are independent, find P(A or B) Please help
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
P(A or B) = P(A) + P(B) - P(A and B)

P(A or B) = P(A) + P(B) - P(A)*P(B) ... this is valid since A and B are independent

I'll let you finish up.
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