A laboratory technician is presented with 31 diagnostic tests for virus X, 10 of which are positive. If she selects 5 out of the 31 tests at random, find the probability that her sample contains precisely 3 positive reports. (Give your answer in 2 d.p)

A laboratory technician is presented with 31 diagnostic tests for virus X, 10 of which are positive. If she selects 5 out of the 31 tests at random, find the probability that her sample contains precisely 3 positive reports. (Give your answer in 2 d.p)

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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