I have tried solving these problems so many times already that I am literally about to lose my mind. I am freaking out because I can't finish it and I just gave myself a horrible headache which makes things worse. Please help!!!!

RainbowPanda
Apr 4, 2018

#1**+1 **

The sample space, that is all the possible family combinations are recorded for you at the bottom of the post. There are 8 of them. That is the sample space. Do you understand that?

so

GBB means that the first child is a Girl the second is a Boy and the third is a Boy.

Do you get that?

The first question is

What is the probability that the firs child is a boy? Well you count the number that have the first child as a boy and you put it over the number in the sample space. Then you simplify the fraction and that is your answer.

All but the last 2 are written in words so they should be easy enough for you to do.

Post your answers if you like and someone, maybe me, will check them for you.

I am not sure what the dot notation is for the last two question. It is probably just multiply.

I haven't looked at it hard enough to decide if this would make sense.

Melody
Apr 4, 2018

#2**-1 **

Thank you, but I'm still so confused. >.<

P (A)= 4/8=1/2

P (B)= 1/8

P (A|B)= 1/2

P (B|A)= 1/8

I don't know the last three

RainbowPanda
Apr 4, 2018