— is Tommy? —Maybe he is in the hospital. He told me that he had sore eyes.
A.
How
B.
What
C.
Who
D.
Where
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参考答案:
举一反三
【单选题】To calculate the expected value of an outcome:
B.
divide the value of each outcome by its probability, then add the results. B divide the value of the desired outcome by the value all possible outcomes
D.
multiply the value of each outcome by its probability, then add the results D use linear regression to assess the expected value of the outcome