Question

A bag contains 10 marbles: 3 are green, 5 are red,

and 2 are blue. Josh chooses a marble at random, and
without putting it back, chooses another one at random.
What is the probability that the first marble is red and the second is blue?
Write your answer as a fraction in simplest form.

Answer 1

`(5)/(10)\cdot(2)/(9)=(1)/(9)\\\\(5red)/(10all)\cdot(2blue)/(9all)`