SOLUTION: the table shows the distribution of a group of 40 college students by gender and class: sophomores juniors seniors males 6

Algebra ->  Probability-and-statistics -> SOLUTION: the table shows the distribution of a group of 40 college students by gender and class: sophomores juniors seniors males 6       Log On


   

Question 471534:
the table shows the distribution of a group of 40 college students by gender and class:
sophomores juniors seniors
males 6 10 2
females 10 9 3

if one student is randomly selected from this group ,find the probability that the student chosen is
(a) not a junior
(b) a female or a sophomore
(c) a male sophomore or a female senior
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

         So  Jr  Sr  T

males    6  10  2  18

females 10   9  3  22

Total   16  19  5  40

ONe chose:

 P(not a JR) = 21/40 

 P(Female or So) = (22 + 16 - 10)/40 = 28/40 = 7/10

 P( a male So or a female Sr) = (6 + 3)/40 = 9/40