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In an exam, 20% got an B mark, 15% get a A, and the other 75% get below that. Six students from this class are

In an exam, 20% got an "B" mark, 15% get a "A", and the other 75% get below that. Six students from this class are randomly selected. The expected number of selected students with an "A", given that at least one of the selected students got a "B" is: Select one: C a. 0.8201 O b. 0.5359 O C. 0.5567 O d. 0.8350 O e. 0.5467

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