Question

A friend claims that it will rain today with probability 30% and tomorrow with probability four times as great as today. Which of the following is CORRECT?

The claim can be true because it is more likely to rain tomorrow if we have rain today.
The claim cannot be true because raining tomorrow is not guaranteed. The claim can be true because it is possible to have rain tomorrow.
The claim cannot be true because any probability is between 0 and 1.

Answer 1

Explanation:

The answer would be:

The claim cannot be true because any probability is between 0 and 1.

Because we can only be 100% certain of something or less.

If he's saying that tomorrow you have 4 times the probability of today, which is 30%, that would be 120%. But you can't be 120% sure that it will rain.

Answer 2

The claim cannot be true because any probability is between 0 and 1.

Explanation:

4 times 0.30 is 1.20, a value that cannot be a probability. Any probability will be between 0 and 1 (inclusive).

The claim cannot be true because any probability is between 0 and 1.