# Probability problem 1

• Mar 9th 2009, 10:53 PM
noro
Probability problem 1
hello im new member here .... and (Crying)and(Crying)and(Crying) ihope some one help me and answer this

4.13 Each month a brokerage house studies various companies and rates each
company's stock as being either "Iow risk" or "moderate to high risk." In a recent report, the brokerage house summarized its findings about 15 aerospace companies and 25 food retailers in the following table:
Company Type
Low Risk
Moderate to High Risk
Aerospace company
6
9
Food retailer
15
10

If we randomly select one of the total of 40 companies, find
a. The probability that the company is a food retailer.
b. The probability that the company's stock is "Iow risk."
c. The probability that the company's stock is "moderate to high risk."
d. The probability that the company is a food retailer and has a stock that is "Iow risk."
e. The probability that the company is a food retailer or has a stock that is "Iow risk."
• Mar 9th 2009, 11:38 PM
Jhevon
it seems obvious to me that these problems will affect your grade in a class somehow. in which case we cannot offer you any specific help, but only (maybe) very general guidelines. in what capacity are you allowed to receive help for these? show what you have attempted for these problems