Question

what is the probability of celecting a girl among all those who are 5,6, or 7

Answer 1

We have three categories from which we can choose {5,6,7}

We need to choose one among these 3

From the rules of probability

Where A is the event of selecting one

P(A)=probability of event A

n(A) = number of ways of selecting=1

n(S)= Total number of options in the Sample Space=3

Hence the probability is 1/3