SOLUTION: prove that this true or false? P(A union B) = P(A) union P(B)

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Question 912297: prove that this true or false?
P(A union B) = P(A) union P(B)
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
prove that this true or false?
P(A union B) = P(A) union P(B)
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Comment on the right side of the equation:
P(A) is a number
P(B) is a number
There is no union of numbers
Comment on the left side of the equation:
P(A union B) is a number
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Conclusion: false
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True Formula: P(A union B) = P(A) + P(B) - P(A and B)
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Cheers,
Stan H.