Question

What formula do I use to get my answer? I’m getting 1/13, but my answer is incorrect. Thank you.

Answer 1

We will have the following:

First, the probability of getting the first t-shirt white will be:

`p_1=(4)/(9)`

And the probability of getting the second t-shirt white will be:

`p_2=(3)/(8)`

Now, the probability of getting the two white t-shirts one after the other will be:

`\begin{gathered} p_3=p_1\ast p_2\Rightarrow p_3=(4)/(9)\ast(3)/(8) \\ \\ \Rightarrow p_3=(1)/(6) \end{gathered}`

So, the probability of getting the two white t-shirts one after the other is 1/6.