Thursday
March 26, 2015

Homework Help: math - classifying events

Posted by CL on Thursday, May 6, 2010 at 7:58pm.

A market survey has estimate that the probability of a household's subscribing to the following magazines is:

Reader's Digest - 0.6
Chatelaine - 0.5
Maclean's - 0.4
Reader's Digest and Chatelaine - 0.2
Reader's Digest and Maclean's - 0.2
Chatelaine and Maclean's - 0.15
All three - 0.05

a) What is the probability that a household chosen at random subscribes to only Reader's Digest?
b) What is the probability that a household chosen at random subscribes to Chatelaine, Maclean's, or both?
c) What is the probability that a household chosen at random subscribes to one magazine only?

Today, I learnt 3 new formulas..

P(A and B) = P(A) * P(B)
P(A or B) = P(A) + P(B)
P(A or B) = P(A) + P(B) - P(A and B)

and I'm not sure which one to apply to which question. =S

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Statistics Emergency please - People end up tossing 12% of what they buy at the ...
Math - People end up tossing 12% of what they buy at the grocery store (Reader's...
Statistics - People end up tossing 12% of what they buy at the grocery store (...
statistics - People end up tossing 12% of what they buy at the grocery store (...
statistics - People end up tossing 12% of what they buy at the grocery store (...
math - Calculate the expectation (to the nearest cent) for the Reader's Digest ...
Statistics Emergency please - People end up tossing 12% of what they buy at the ...
business communication - effective openers to a sales letter may include all of ...
Legal research - The most familiar method of locating law review and legal ...
english - The events of the plot are designed to reveal the author's point of ...

Members