Question

there are 60 students In a class among which 30 are boys in another class there are 50 students among which 25 of them are boys. if one from each classclass is selected
a) what is the probability of both being girls?
b) what is the probability of having at least one girl?​

Answer 1

Answer:

Hey mate

Step-by-step explanation:

1st class:

60 students in which 30 are boys.....

Therefore, there is 30 girls....(because 60 - 30 = 30)

2nd class:

50 students in which 25 are boys..........

Therefore, there is 25 girls......(because 50 - 25 = 25)

a)p(both being girls) = 30 + 25/110

  =55/110

b)p(getting at least one girl) = 55/2

                                              =27.5/110

Hope you get it................

Answer 2

Answer:

Class 1 -

Total Students = 60

Boys = 30

Girls = 60 - 30 = 30

Class 2 -

Total Students = 50

Boys = 25

Girls = 50 - 25 = 25