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Probability of an event E + Probability of the event ‘not E’
The probability of an event that is certain to happen is
The event that is sure to happen is called a certain event and probability of such an event is 1 as this event is bound to happen.
A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is
(ii) not red?