To solve this problem, we need to understand that the probability of an event "not happening" is equal to 1 minus the probability of the event "happening."
Given:
- The probability of rain tomorrow (event happening) is 30%, or 0.30 when expressed as a decimal.
We want to find:
- The probability it will not rain tomorrow (event not happening).
To calculate this, we take the probability of all possible outcomes (which is always 100% or 1 in decimal form), and subtract the probability of rain:
Probability of not raining = 1 - Probability of raining
Converting the percentage to a decimal (since 30% = 0.30), we get:
Probability of not raining = 1 - 0.30
Probability of not raining = 0.70
So, the probability that it will not rain tomorrow is 0.70, or 70% when expressed as a percentage.
