Gia0614
04-01-2006, 11:08 PM
:eek: Need help with these two. Have tried and tried and tried.
Q1
Recent developments appear to make it possible for couples to dramatically increase the likelihood that they will conceive a child with the gender of their choice. In a test of a gender method 11 couples are trying to have a baby girl.
If this gender selection has no effect, what is the probability that the 11 babies will all be girls?
Q2
The table below shows the results of administering a diagnostic test for early virus infection.
Positive Test Result Negative Test Result
(Infection Indicated) (Infection Not Indicated)
Subject is infected 84 8
Subject is not infected 7 13
If two different subjects are randomly selected, find the probability that they both test positive.
Q1
Recent developments appear to make it possible for couples to dramatically increase the likelihood that they will conceive a child with the gender of their choice. In a test of a gender method 11 couples are trying to have a baby girl.
If this gender selection has no effect, what is the probability that the 11 babies will all be girls?
Q2
The table below shows the results of administering a diagnostic test for early virus infection.
Positive Test Result Negative Test Result
(Infection Indicated) (Infection Not Indicated)
Subject is infected 84 8
Subject is not infected 7 13
If two different subjects are randomly selected, find the probability that they both test positive.