SOLUTION: table cola root beer sprite under 21 years of age= 40 25 20 between 21 and 40= 35 20 30 over 40= 20 30

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Question 667365: table
cola root beer sprite
under 21 years of age= 40 25 20
between 21 and 40= 35 20 30
over 40= 20 30 35
If one of the 255 subjecta is randomly selected , find the probability that the person is over 40 years of age (fraction form) Please let me know formula used.. I want to learn :)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

                          cola  root beer  sprite

under 21 years of age= 40     25         20  tot= 85

between 21 and 40=     35     20         30  tot = 85

        over 40=               20     30         35   tot = 85

 If one of the 255 subjects is randomly selected

P(over 40) = 85/255 = 1/3