Posted by Sharon on Wednesday, October 7, 2009 at 11:11pm.
Suppose P(A)= .3, P(B)=.4, and the P(A + B) = .12. What is:
a.) P(A/B)?
b.) P(B/A)?
c.) are A and B independent? Explain your answer.

probabilty  drwls, Wednesday, October 7, 2009 at 11:39pm
P(A/B) is the probability of A when B also happens. It equals 0.12/0.4 = 0.3, which is also P(A)
P(B/A) is the probability of B if A also happens. It equals 0.12/0.3 = 0.4, which also equals P(B)
The probability of A does not depend upon what happened to B and vice versa.
They are therefore independent.
This also follows from
P(A+B) = P(A)*P(B)
Answer This Question
Related Questions
 probabilty  Suppose that when a job candidate comes to interview for a job at, ...
 Probabilty  The public transport system is aware that one person in twenty does...
 math  suppose that an experiment has four possible outcomes. a,b,c and d. if p(...
 Probabilty  Suppose i have a deck of 40 cards numbered 110 in red, yellow, ...
 Probability  The public transport system is aware that one person in twenty ...
 Statistics  One event A is _________________ of another event B if the ...
 Math ; please please help.  1. Explain in detail how to determine the value of ...
 probability  explain the probabilty of one event in a fair game with three ...
 English  1.(The hikers walked) until they were exhausted. 2.Has John met the ...
 Grammarclauses  I put the underlined parts of the sentences in parentheses. ...
More Related Questions