Question

suppose a weather app says that the probability of rain today is 30%. What is the complement of the event ""rain today"" what is the probability of the complement

Answer 1

The complement event would be: "No rain today"

Its probability would be 70%

Explanation:

Given the event:

A= rain today

The probability of rain today is 30%

P(A)=30%=0.3

The complement event has all the values that are not included in the event.

The complement event would be:

A'= No rain today

The probability of a event is the subtraction between 1 and the complement event:

P(A')=1-P(A)

Then, the probability of the event "No rain today" will be:

P(A')=1-0.3=0.7=70%