Question

Which of the following numbers cannot be a probability?

• A. \( 0.5 \)
• B. \( 1.9 \)
• C. \( 80% \)
• D. \( \frac{3}{4} \)

Hint:

The probability of any event always lies between 0 and 1: \[ 0 \leq P(A) \leq 1. \] If any number is outside this range, it is not a valid probability.

Answer 1

The Correct Option is B

A probability must be between 0 and 1. The given options include:
\[ 0.5, 80% = 0.8, \frac{3}{4} = 0.75, 1. \] Since 1.9 is greater than 1, it cannot be a valid probability.