Question

A box contains four red balls and eight black balls. Two balls are randomly chosen from the box, and are not replaced. Let event B be choosing a black ball first and event R be choosing a red ball second. What are the following probabilities?

Answer 1

The question has four different answers.  The first answer is: 8/12.  Second: 4/11.  Third: 8/33.  Fourth: 24.  Hope this helps!

Answer 2

First answer: 8/12
Second answer: 4/11
Third answer: 8/33
fourth answer: 24 percent