Complementary events?

If two events, Event A with probability P(A) and Event B with probability P(B) are complementary events then





A. P(B) = P(A)


B. P (A) · P( B) = 0


C. P(B) = 1 - P(A)


D. P(A) + P(B) = 0











im not sure what exactly this is?

Complementary events?
complementary events A and B: what A doesn't cover, B does. together they cover all the possibilities.





Ex: 5 red balls, 3 blue balls


A = drawing a red


B = drawing a blue





P(A) + P(B) = 1


thus, the answer is c

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