Question

from a group of 2 boys and 3 girls, two children are selected at random. find the probability

both selected children are girls

the selected group consists of one boy and one girl

at least one boy is selected

Answer 1

Answer:

boys = 2

girls = 3

2 are to be selected from the 5.

total ways = 5C2 = 10

ways in which not a single  boy is selected = ways in which we can select 2 girls = 3C2 = 3

So ways in which atleast one boy is selected = 10-3 = 7

Probability = 7/10