AIEEE Exam

A bag contains 12 red balls and 6 white balls. Six balls are drawn one by one without replacement of which atleast 4 balls are white. Find the probability that in the next two draws exactly one white ball is drawn. (leave the answer in terms of nCr).

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AIEEE Other Question

A circle touches the line 2x + 3y + 1 = 0 at the point (1, -1) and is orthogonal to the circle which has the line segment having end points (0, -1) and (-2, 3) as the diameter The probability of A speaks truth 4/5 while B is 3/4. The probability that they contradict each other when asked to speak on a fact is