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The following table summarizes the results of a poll taken of CEOs and analysts about the economic impact of a pending piece of legislation:
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Group
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Think the legislation will have a positive impact.
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Think the legislation will have a negative impact.
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Total
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Others
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40
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30
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70
|
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Analysts
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100
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30
|
130
|
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Total
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140
|
60
|
200
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What is the probability that a randomly selected individual from this group will be either an analyst or someone who thinks this legislation will have a positive impact on the economy?
A. 0.35.
B. 0.58.
C. 0.64.
None of the above
[此贴子已经被venson于2005-11-26 22:49:31编辑过] | 
发表于 2005-6-2 13:51
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