The statement is incorrect because it presupposes that temperature change has only two potential outcomes: an increase or a decrease. However, it's important to note that there exists the third possibility where the temperature remains constant.
What is probability?
Probabilities serve as a quantification of the likelihood of an event happening. They span from 0, denoting the event's impossibility, to 1, signifying the event's certainty.
The total of all probabilities linked to potential outcomes within an event always equals 1.
Complete question:
Explain why the following statements are incorrect. [marks]
a) The probability that the temperature will increase over the next few hours is 0.7. Therefore the probability that the temperature will decrease over the same period of time is 0.3.