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Theoretical Probability

If the sum of...

Question

If the sum of probabilities of two events is 1, then they are ___________.

A

supplementary

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B

complementary

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C

equal

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D

none of the above

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Solution

The correct option is B complementary
If two events are complementary, then the sum of probabilities of the two events is 1.

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Similar questions

The sum of probabilities of two mutually exclusive events will be 1.

Q. Mark the correct alternative in the following question:

If two events are independent, then

(a) they must be mutually exclusive
(b) the sum of their probabilities must be equal to 1
(c) (a) and (b) both are correct
(d) none of the above is correct

\frac{1 + 3 p}{3}, \frac{1 - 2 p}{2}

are probabilities of two mutually exclusive events, then p lies the interval

Q. The sum of probabilities of two complementary events is

Q. Assertion :If the probability of an event

A = 0.2

& the probability of the event B is 0.3, then the probability of neither A nor B occurs depends upon the fact that A & B are mutually exclusive or not. Reason: Two events A & B are mutually exclusive if they do not have common elements between them.

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