Question
An urn contains 3 white and 6 red balls. Four balls are drawn one by one with replacement from the urn. Find the probability distribution of the number of red balls drawn. Also find mean and variance of the distribution.
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Question 1
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Two events and have probabilities 0.25 and 05, respectively. The probability that both and occur simultaneously is 0.14. then the probability that neither nor occurs is (A) 0.39 (B) 0.25 (C) 0.11 (D) none of theseQuestion 3
The probabilities of two students A and B coming to the school in time are and respectively. Assuming that the events, A coming in time and B coming in time are independent, find the probability of only one of them coming to the school in time. Write at least one advantage of coming to school in time.Question Text | An urn contains 3 white and 6 red balls. Four balls are drawn one by one with replacement from the urn. Find the probability distribution of the number of red balls drawn. Also find mean and variance of the distribution. |