1. During a 52 week period, a company paid overtime wages for 18 weeks and hired temporary help for 9 weeks. During 5 weeks, the company paid overtime and hired temporary help

a. Are the events "Selecting the week that contained overtime wages",and "selecting a week that contained temporary help wages" mutually exclusive? Explain.

b. If an auditor randomly examined the payroll records for only one week, what is the probability that the payroll for the next week contained overtime wage or temporary help wage?

Solution Summary

The solution gives step by step procedure for computing probability based on addition theorem.

A study of 203 advertising firms revealed their income after taxes:
Income after Taxes Number of Firms
Under $1 million 102
$1 million to $20 million 54
$20 million or more 47
(a) What is the probability an advertising firm sele

In our virtual world, we own a construction company and bid on projects. Based on our past history of winning bids on projects, the probability of winning the next contract to build a school is 0.40, to build a hospital is 0.30 and to build both a school and a hospital is 0.20. What is the probability of winning a contract to bu

I'm totally lost in this subject especially when i have to solve problems using probability for trihybrid. I have of not knowing when to use the Rule of Addition and when to us the rule om Multiplication. I will try to show you what i know and maybe you can help me impron on what i already know.
R r
R(RR)(Rr)
r(r

If Chebychev Inequality gives the lower bound for probability. For the present problem the lower bound for the probability is 0.75 and actual probability is 0.87. There is no contradiction between empirical rule and Chebychev Inequality
Given percentage (87%), does the empirical rule apply?
What does the Empirical Rule s

1.) If the population is normally distributed then the sample mean is also normally distributed even for small sample size.
True or false?
2.) In applying the Rule of Addition in Probability, the important consideration is whether they are mutually exclusive or not.
True or false?

If two dice are thrown, what is the probability that the first die shows a 4 or that the total on the two dice is 8?
So far in calculations:
Event A = 4/36
Event B = 5/36
(4/36 + 5/36) - 1/36 = 8/36 or 2/9 which is not the correct answer.

The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of the bulbs have lifetimes that lie within one standard deviation of the mean on either side? Use the 68-95.99.7 Rule.
Please give a through and simplistic explanation in th

Scores on the GRE (graduate record examination) are normally distributed with a mean of 510 and a standard deviation of 148. Use the 68-95-99.7 rule to find the percentage of people taking the test who score between 66 and 954.
The percentage of people taking the test who score between 66 and 954 is ___%

The probability that person going to a movie will buy a soft drink is 0.20; the probability that the person will buy popcorn is 0.40; and the probability that the person will buy both a soft drink and popcorn is 0.10. If one movie-going person is selected at random, what is the probability that:
A) He/she will buy popcorn or