A weatherman states that the probability that it will rain tomorrow is 10%, or 0.1, & the probability that it will snow is 25%, or 0.25. What is the probability that it will not rain or snow?

• A. 0.35
• B. 0.65
• C. 0.75
• D. 0.90

Answer: (B)

Verified step by step guidance

1. Understand that the probability of an event not occurring is 1 minus the probability of the event occurring. This is because the total probability of all possible outcomes must equal 1.
2. Identify the probability that it will rain tomorrow, which is given as 0.1.
3. Identify the probability that it will snow tomorrow, which is given as 0.25.
4. Calculate the probability that it will rain or snow by adding the probabilities of each event: 0.1 + 0.25.
5. Subtract the probability that it will rain or snow from 1 to find the probability that it will not rain or snow: 1 - (0.1 + 0.25).