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The probability of success of three students X, Y and Z in the one examination are 1/5, 1/4 and 1/3 respectively. Find the probability of success of at least two?
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An urn contains 6red, 5 blue and 2 green marbles. If three marbles are picked at random, what is the probability that at least one is blue?
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Derek throws three dice in a special game. If it knows that he needs 15 or higher in this throw to win, then find the chance of his winning the game?
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You toss a coin and roll a die. What is the probability of getting a tail and a 4 on the die?
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