a couple is planning to have three children. Find the probability that the couple will have:

Question

a.) 2 girls and 1 boy?
b.) 2 girls followed by a boy?
c.) at least 1 girl?

please answer my question thank you very much, have a good day!

Answer 1

There are 8 ways to have B G

a)2 girls and 1 boy ---> GGB GBG BGG
Prob = 3/8

b) 2 girls followed by boy --->GGB
prob = 1/8

c) at least one girl, means exclude BBB
prob = 1 - 1/8 = 7/8