Question

In a family of 3 children the probability of having at least one boy

Answer 1

#MarkAsBrainliest

In probability ‘at least’ is specific term where we have to calculate probabilities of all occurrence of an event starting from ‘minimum’ number till ‘maximum’ number .

As an example , in this question we have to find :

Probability of at least 1 boy is = Probability of one Boy + Probability of two Boys + Probability of all three Boys

Probability of all three Boys = (1/2)*(1/2)*(1/2) = 1/8

Probability of two Boys = (1/2)*(1/2) = 1/4

Probability of one Boy = 1/2

Probability of at least one boy = 1/2 + 1/4 + 1/8 = 7/8