A number from 1 to 20 is selected at random. What is the probability the selected number is even and a multiple of three?
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In a class of 30 students, 17 study Mathematics, 19 study Biology and 11 study both subjects. What is the probability that a student selected at random from the class studies neither subject?
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Every person attending a clinic has either condition A or condition B or both. If the probability that an attendee has condition B is 0.51 and the probability that an attendee has both condition A and condition B is 0.18, what is the probability that an attendee has condition A only?
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An experiment consists of drawing two cards from a deck of 52 playing cards. What is the probability of drawing a red 8 or a black even card from the deck?
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Every applicant for a job has either qualifications in Maths or Physics or both. If the probability that an applicant has qualifications in Maths is 0.65 and the probability that an applicant has qualifications in Physics is 0.45, what is the probability that an applicant has qualifications in both Maths and Physics?
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