Question

If two events are complementary, then the sum of their probabilities is


A)
0.


B)
0.25.


C)
0.5.


D)
1.

Answer 1

The complement of an event is the event that does not occur so they're mutually exclusive, you can have a or you can have b, but you can not have both. So the sum of their probabilities is like asking

"if you flip a coin, what is the probability that it will land on heads OR tails?"

Answer 2

1 out of 2

Answer 3

What is the chance that 'either' will happen.


It will always be 100% that you will get heads OR tails. The chance you will get heads is 50%, the chance you will get tails is 50%, but the chance that you will get either heads or tails is 100%. You 'must' get something

Answer 4

oh i see

Answer 5

Good :)