MATH 115 Midterm: MATH 115 UPenn m115 sExam 4 Exams
Document Summary
Math 115 sample final exam 4: ten equally-quali ed applicants, 6 men and 4 women, apply for 3 lab technician positions. Unable to justify choosing any of the applicants over the others, the personnel director decides to select 3 at random. 9: a random variable x on the interval [1, ) has probability density function f (x) = 30 (a) 0 (h) (b) (d) (g) (e) (c) The variance of this random variable is (a) (b) 3 (d) (c) 2: consider the following experiment: a fair coin is ipped until the rst heads appears, and the number of ips is recorded. If this experiment is repeated three times, what is the probability that the result (number of ips) is the same all three times? (a) 2: a box contains 3 red balls, 4 white balls, and 3 blue balls. Balls are drawn from the box one at a time, at random, without replacement.
