in a group of 20 boys and 10 girls, 5 boys and 3 girls are honest if two persons - Maths - Probability

Question

in a group of 20 boys and 10 girls, 5 boys and 3 girls are honest
if two persons are to be selected at random from the group, find
the probability if either both are girls or both are honest

Swati And Manisha Maheshwari · Answer

favourable outcome are no of girls + no of honest boys =
10+5=15
total favourable outcomes are 30
p(a) = 15/30 = 1/2

in a group of 20 boys and 10 girls, 5 boys and 3 girls are honest. if two persons are to be selected at random from the group, find the probability if either both are girls or both are honest.