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

Question

Quizplus · Accepted Answer

The probability for tomorrow would be 4 times 30%, which is 120%, exceeding the maximum probability limit of 100% (or 1). Thus, the claim violates the basic rule of probabilities being between 0 and 1.

A Friend Claims That It Will Rain Today with Probability