Question

I NEED HELP !!! If the probability of an event is StartFraction 2 over 7 EndFraction, what must be the probability of its complement?

StartFraction 1 over 7 EndFraction
StartFraction 2 over 7 EndFraction
StartFraction 4 over 7 EndFraction
StartFraction 5 over 7 EndFraction

Answer 1

The probability of the complement of the original event is 5/7.

Explanation:

The probability of the complement of an event is 1 less the probability of the event, so

We get: 1 - 2/7, or 5/7

The probability of the complement of the original event is 5/7.

Note that 5/7 and 2/7 add up to 7/7, or 1.

Answer 2

The answer is StartFraction 5 over 7 EndFraction