2. 外语
  3. Quantity A: The probability that event R occurs is 0.38 the probability that events R and W both occur Quantity B: 0.4

Quantity A: The probability that event R occurs is 0.38 the probability that events R and W both occur Quantity B: 0.4

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问题 Quantity A: The probability that event R occurs is 0.38 the probability that events R and W both occur
Quantity B: 0.4
选项 A、Quantity A is greater.
B、Quantity B is greater.
C、The two quantities are equal.
D、The relationship cannot be determined from the information given.
答案B
解析 事件R发生的概率是0.38，事件R和W同时发生的概率必然小于单个事件发生的概率，不管这两个事件独立与否，因此两者同时发生的概率最大为0.38，小于0.4，所以选择B。
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