Question

from the group of 3 boys and 2 girls we select 2 children. what is the representing the event. find the probability of

one girl selected

at least one girl selected

two bys are selected

Answer 1

Let the boys are represented by { X, Y, Z } and girls are represented by { P, Q }.
We have to select 2 children. Therefore, 10 cases are possible:
(X, P);(X, Q);(Y, P);(Y, Q);(Z, P);(Z, Q);(X, Y);(X, Z);(Y, Z);(P, Q) 
Total number of outcomes = 10
1)P[one girl]=6/10
                   =3/5
                   =0.6
2)P[at least on girl]=7/10
                              =0.7
3)P[two boys are selected]=3/10
                                             =0.3

Answer 2

Answer:

1by5: one girl

2by5:atleast one girl