Question

Which numbers could not be used to represent the probability of an event.

a) 0
b) 0.5
c) 1
d) -1

Answer 1

The number that could not be used to represent the probability of an event is -1.

Step-by-step explanation:

The number that could not be used to represent the probability of an event is d) -1.

1. a) 0: This represents the probability of an impossible event, meaning it will never occur.
2. b) 0.5: This represents a 50% chance or a 1 in 2 probability.
3. c) 1: This represents a certain event, meaning it will always occur.
4. d) -1: Negative numbers cannot be used to represent probabilities because probabilities are always non-negative.