a bag contains 13 marbles of which 10 are red. A marble is selected at random and replaced. A second marble is then selected at random. What is the probability that both marbles are red?

Answer 1

can some one please help me

Answer 2

The prob of red for the first marble is 10/13
since you are returning it, the second try has the same probability
so ...
(10/13)(10/13) = 100/169

Answer 3

Thank you Reiny so then when ever they are asking something similar like this question I always mult. then? or it depends on what the question is asking me for.

Joe