Probability of marbles

Question

find the probability of picking 2 blue marbles when the marbles picked (with replacement) from a bag containing 5 blue and 8 yellow marbles

Answer 1

Sadie

Probability (1st is blue) x Probability (2nd is blue)

As we have 5 blue out of 13 first probability is 5/13

Second probability is the same because we replace the marble

So (5/13) x (5/13) = 25 / 169

Mike