Question

An event is successful 1 out of every 5 attempts. What is the probability of thecomplement of that event?O 0.20O cannot be determined© 0.15O 0.80

Answer 1

Given that an event is successful 1 out of every 5 attempts, you can determine that the probability of that event is:

`P(A)=(1)/(5)`

Let be "A" the event.

By definition, the probability of the complement of an event can be calculated by subtraction the probability of the event from 1:

`P(A^(\prime))=1-P(A)`

Therefore, substituting the probability of the event A into the formula and evaluating, you get:

`P(A^(\prime))=1-(1)/(5)=((1)(5)-1)/(5)=(5-1)/(5)=(4)/(5)=0.80`

Hence, the answer is: Last option.