SOLUTION: Out of 50 students, 18 study Biology, 26 study Physics, and 2 study Biology AND Physics. What is the probability that a student who is randomly chosen studies Biology OR Physic

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Question 1180897: Out of 50 students, 18 study Biology, 26 study Physics, and 2 study Biology AND Physics.
What is the probability that a student who is randomly chosen studies Biology OR Physics?
Answer by ikleyn(52776) About Me  (Show Source):
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Out of 50 students, 18 study Biology, 26 study Physics, and 2 study Biology AND Physics.
What is the probability that a student who is randomly chosen studies Biology OR Physics?
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    P(Biology OR Physics) = P(Biology) + P(Physics) - P(Biology AND Physics) = 


                          = 18%2F50+%2B+26%2F50+-+2%2F50 = %2818%2B26-2%29%2F50 = 42%2F50 = 21%2F25 = 84%2F100 = 0.84 = 84%.    ANSWER

Solved.