Final answer:
The incorrect statement about probability is that it is always expressed as a percentage; it can also be expressed as a decimal or fraction.
Step-by-step explanation:
The statement that is not true about probability is 'C) Probability is always expressed as a percentage.' This is false because while probability can be expressed as a percentage, it is more commonly given as a fraction or a decimal between 0 and 1. Options 'A)', 'B)', and 'D)' correctly define that probability values range from 0 to 1, the sum of probabilities for all possible outcomes must equal 1, and that the probabilities of independent events multiply together.
Statement C is not true about probability. Probability is not always expressed as a percentage. It is a number between 0 and 1, inclusive, that represents the likelihood of an event occurring.The correct statement about probability is that probability values range from 0 to 1 (Statement A). The sum of all possible outcomes' probabilities is always 1 (Statement B). Independent events have probabilities that multiply together (Statement D).