Three unbiased coins are tossed. What is the probability of getting at most two heads?
Correct answer D. 7/8
Tip: press A, B, C or D to answer, and N for the next question.
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See allWhat is the probability of getting a sum 9 from two throws of a dice?
Correct answer C. 1/9
In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?
Correct answer A. 1/3
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A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?
Correct answer A. 10/21
Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?
Correct answer D. 9/20
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