The sum of probability of an event and its complementary is Q & A › Category: Probability and Statistics › The sum of probability of an event and its complementary is 0 Vote Up Vote Down Admin Staff asked 5 years ago The sum of probability of an event and its complementary is A) 1 B) 0 C) Infinity Share this:TwitterFacebookWhatsAppPinterestLike this:Like Loading... 1 Answers 0 Vote Up Vote Down Admin Staff answered 5 years ago A) 1 Share this:TwitterFacebookWhatsAppPinterestLike this:Like Loading...