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1. Multiple Choice: If a life science experiment has three possible outcomes with probabilities 0.2, 0.5, and 0.3 respectively, what is the probability that the outcome will either be the first or the second one? - A) 0.2 - B) 0.5 - C) 0.7 - D) 0.8 Correct Answer: C) 0.7 Rationale: The probability of either the first or the second outcome is the sum of their individual probabilities, which is 0.2 + 0.5 = 0.7. 2. Fill-in-the-Blank: In a clinical trial, the probability of a successful treatment is 0.85. If the treatment is independent and repeated twice, the probability that both treatments are successful is _______. Correct Answer: 0.7225 Rationale: The probability of both independent events occurring is the product of their individual probabilities, which is 0.85 * 0.85 = 0.7225.
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