SOLUTION: In a class of 30 students, 16 are democrats, 4 are business majors, and 3 of the business major are democrats. If one student is randomly selected, find the probability of choosing
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Question 1195518: In a class of 30 students, 16 are democrats, 4 are business majors, and 3 of the business major are democrats. If one student is randomly selected, find the probability of choosing a Democrat or a business major Answer by ikleyn(52778) (Show Source):
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In a class of 30 students, 16 are democrats, 4 are business majors,
and 3 of the business major are democrats. If one student is randomly selected,
find the probability of choosing a Democrat or a business major
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Use the general formula for the probability of union of two events, A and B
P(A U B) = P(A) + P(B) - P(A ∩ B).
In your case, this formula takes the form
P(Democrat or a business major) = + - = = . ANSWER
