Which of the following cannot be the probability of an event?
(A) 2/3
(B) –1.5
(C) 15%
(D) 7
Answer:
The probability of an event must be between 0 and 1.
- (A) 2/3: Valid, as it’s between 0 and 1.
- (B) -1.5: Not valid, probabilities cannot be negative.
- (C) 15%: Valid, as 15% = 0.15.
- (D) 0.7: Valid, as it’s between 0 and 1.
Thus, the answer is (B) -1.5, as probabilities cannot be negative.