MATH10120 Midterm: Math10120F14 Exam Solutions ReviewEX3forF11 copy
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9 the following is a histogram for the probability distribution of a random variable x. What is p(x 3)? (a) 0. 4 (b) 0. 6 (c) 0. 8 (d) 0. 2 (e) 0. 5. P(x 3) = p(x = 1) + p(x = 2) + p(x = 3) = 0. 1 + 0. 2 + 0. 2 = 0. 5. What is the probability that the number on. 3 3 (a) c(10, 7) 1 (e) p(10, 7) 1 (d) p(10, 7) 1. 2 3 (b) p(10, 3) 1 (c) c(10, 3) 1. The probability of getting a 5 or higher (a 5 or a 6) on one roll of the die is 1/3. Let x denote the number of times we get a 5 or higher out of the 10 rolls. Using the formula for a binomial random variable, we get. P(x = k) = c (n, k)pk qn k .
