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

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) (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

 

RELATED QUESTIONS

Mrs. DiNardo's physics class has 115 students, classified by academic year and gender, as  (answered by greenestamps,stanbon)
5.The advisor of an ecology club at a large college expects that the group consists of... (answered by stanbon)
A class consists of 1/4 freshmen,1/5 sophomores, and 1/10
juniors; the rest are seniors.  (answered by mananth)
A class consists of 1/3 freshmen, 1/6 sophomores, and 1/3 juniors; the rest are... (answered by josgarithmetic)
A class consists of 2 freshman, 4 sophomores, 10 juniors, and 4 seniors. If you randomly
 (answered by Boreal)
a group of 6 seniors , 5 juniors , and 3 sophomores want to attend a field trip . only 10  (answered by sudhanshu_kmr)
According to the college registrar's office, 60% of students enrolled in an introductory... (answered by stanbon)
A group of three seniors, six juniors, and five sophomores must select a committee of... (answered by Alan3354)
In a Pre-Algebra class containing 31 students, there ar 18 freshman, 10 sophomores and 3... (answered by josmiceli)