12、A fundamental analyst studying 100 potential companies for inclusion in her stock portfolio uses the following three screening criteria:

Assuming that the screening criteria are independent, the probability that a given company will meet all three screening criteria is closest to:

A. 2.0%.

B. 8.5%.

C. 20.0%.

D. 85.0%.

[此贴子已经被作者于2008-11-7 13:45:30编辑过]

12、A fundamental analyst studying 100 potential companies for inclusion in her stock portfolio uses the following three screening criteria:

Assuming that the screening criteria are independent, the probability that a given company will meet all three screening criteria is closest to:

A. 2.0%.

B. 8.5%.

C. 20.0%.

D. 85.0%.

  
Correct answer = A

"Probability Concepts," Richard A. Defusco, Dennis W. McLeavey, Jerald E. Pinto, and David E. Runkel
2008 Modular Level I, Vol. 1, pp. 327-329
Study Session 2-8-e
calculate and interpret 1) the joint probability of two events, 2) the probability that at least one of two events will occur, given the probability of each and the joint probability of the two events, and 3) a joint probability of any number of independent events
The joint probability of the three independent criteria:
0.2 x 0.4 x 0.25 = 0.02 or 2% of the 100 companies. 

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