Statistics - Probabilities

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1. A card is taken out of a pack of 52 cards numbered 2 to 53. The probability that the numbers on the card is a prime number less than 20 is

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2. The probability of getting a number between 1 and 100. Which is divisible by one and itself only is

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3. If A and B are two elements such that P(A) = 2/3, P(B) = 3/4, P(A ∩ B) = 1/2, then P(A ∪ B) =

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4. If A and B are two events such that P(A ∪ B) = 0.65, P(A ∩ B) = 0.15, then P(A') + P(B') =

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5. If A, B, C are three events, then P(A ∩ B ∪ C) =

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