Question

The probability that it will rain tomorrow is 0.85. What is the probability that it will not rain tomorrow?

Answer 1

Given: Probability that it will rain tomorrow is 0.85
If B be the event of raining tomorrow, then the probability P (B), is 0.85.
Now, event of raining tomorrow and not raining tomorrow are complementary to each other.
So, the probability of not raining tomorrow = 1 — P (B)
= 1 — 0.85
= 0.15
As we know, sum of probability is always equal to 1.