<PRE><B>Question 545779</B>
The accompanying table shows the percentages of residents in a large community when classified according to gender and presence of a particular allergy.
---------Allergy
------Present-----Absent-----Total
Male----15----------36-------51

Female--40----------39-------79
Total---55----------75-------130

Suppose that the selection of a person is considered a trial and the presence of the allergy is considered a success. For each case, identify the numerical value of p and find the required probability.

Two males and two females are selected at random. What is the probability that none has the allergy?
P(2 males absent) = 15C2/51C2 = 0.0824
P(2 females absent) = 40C2/79C2 = 0.2532
----
P(2males AND 2females absent) = 0.0824*0.26532 = 0.0209
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Cheers,
Stan H.
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