3
QuizMultiple Choice

Probability Rules

Question 3 • Probability and Statistics with Applications Honors Sem-2-FL-1210300 (2024-2025)

Sports science researchers determined that, for those people who skateboard, 22% have never had an injury, 45% have had one injury, 18% have had two injuries, and 15% have had three or more injuries. What is the probability that a randomly chosen skateboarder has had one or two injuries?

Answer
A
0.18
B
0.45
C
0.63
D
0.78

Explanation

Having one or two injuries combines two mutually exclusive groups, so add their probabilities: 0.45 + 0.18 = 0.63. The probability is 0.63, or 63%, which is choice C.

AI-written and checked against the verified answer.

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