4. A package of 50 computer chips contains 45 that are perfect and 5 that are defective. If 2 chips areselected at random, what is the probability thata) Neither is defective?b) Both are defective?c) Only one is defective?

45 perfect chips 5 defective chips 50 total chips select 2 chips at random

Answered: 4. A package of 50 computer chips…

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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BCC’s Math Club has 40 members, 24 females and 16 males. 4 of the females and 6 of the males are math majors. a) If 2 club members are randomly selected to plan the end of year Math Party, what is the probability that a male is selected first and a female is selected second? b) If 2 club members are randomly selected to plan the end of year Math Party, what is the probability that neither is male? c) At the Math Party, one club member is randomly selected to win the door prize (a pocket protector). What is the probability that a math major was selected, given that the winner was female?
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An urn has 19 balls that are identical except that 6 are white, 8 are red, and 5 are blue. What is the probability that all are white if 2 are selected randomly without replacement?
4 a) A Mathematics paper consists of 12 questions of which not more than ten are to be answered. Given that the number of candidates who answer ten questions is equal to the number of candidates who answer nine questions only. Find the probability that a candidate chosen at random from among these two sets of candidates will have selected questions 1, 2 and 3 if all the questions have the same chance of being selected. b) Three groups of three people are to be selected from nine people, of whom three are man teachers, two lady teachers and parents. Find the probability that i) the two lady teachers being in the same group. ii) one group consists of at least two of the man teachers.
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4. A package of 50 computer chips contains 45 that are perfect and 5 that are defective. If 2 chips are selected at random, what is the probability that a) Neither is defective? b) Both are defective? c) Only one is defective?