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Are mutually exclusive events also complementary events?


Asked by Lennon Buck on Dec 03, 2021 FAQ



Complementary events are always mutually exclusive, but mutually exclusive events are not necessarily complementary. Given an experiment involving rolling two dice, the event of the dice dots having a sum of six and the event of the dice dots having a sum of eight are mutually exclusive.
Subsequently,
All complementary events are mutually exclusive, but all mutually exclusive events are not necessarily complementary.
And, Complementary events are mutually exclusive events since they cannot occur at the same time. They are also considered as exhaustive events since the sum of their probabilities must be 1. How do you find the probability of complementary events?
Furthermore,
Disjoint events are those events which cannot occur at the same time, say one cannot pass and fail in the same exam. Whereas complementary events are those two mutually exclusive events whose sum of probabilities equal to 1, say when rolling a die once, the event of getting 1 and the event of getting more than 1 are complementary events.
One may also ask,
In probability theory, the complement of any event A is the event [not A], i.e. the event that A does not occur. The event A and its complement [not A] are mutually exclusive and exhaustive. Likewise, what do you mean by complementary events?