Out of 3n consecutive natural numbers, 3 numbers are chosen at random without replacement. Find the PROBABILITY-Problems in Engg. Competitions 2009 probability that the sum of chosen numbers is divisible by 3.
Let A, B, C be three events such that P (A) = 0.3, P (B) = 0.4 and P(C) = 0.8, P (A∩B) =0.08, P (A ∩ C) =0.28, P (A∩B∩ C) = 0.09. If P (A U B U C) = 0.75, then find P (B∩C).
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