Question

Suppose you choose a marble from a bag containing 5 red marbles, 3 white marbles, and 6 blue marbles. You return the first marble to the bag and then choose again. Find P(red and blue).

Answer 1

$|\Omega|=14^2=196\\ |A|=5\cdot6\cdot2=60\\\\ P(A)=\dfrac{60}{196}=\dfrac{15}{49}$