Question

From a class of 12 girls and 18 boys two students are chosen randomly what is the probability that both of them are girls

Answer 1

$\frac{12c2}{30c2}$

Answer 2

Answer:

Step-by-step explanation:

No of girls = 12

No of boys =18

Total students=12+18=30

Total no of ways of selecting students

=30C2= 15*29

Therfore selecting both the girls= 12C2=11*6

So Probability that both of them are girls

=11*6/15*29= 22/145