Explanation
Step 1: Recall the definition of probability Probability is a measure between 0 and 1, inclusive. Step 2: Evaluate the options 15% = 0.15 (between 0 and 1) 2/3 ≈ 0.67 (between 0 and 1) -0.5 (less than 0) 0.01 (between 0 and 1) Step 3: Determine which option is outside the valid range -0.5 is less than 0, which is not valid for a probability.
