Assume a box contains three red jelly beans and two green ones. We consider the event that a red bean is drawn. Suppose I pick a jelly bean from the box without looking. I record the color but do not put the bean back in the box. Then I choose a bean again. What is the probability of getting two red beans?

Question

Enter fraction in lowest terms.

Answer 1

P(red,red) = 3/5 * 2/4

You don't really need to record the color, since the bean was not replaced. Unless you have eaten it, you can just look at the two beans drawn.

Answer 2

What is the probability of second being red, if I ate the first one???