Question

A box is filled with 8 cards, 6 yellows cards, and 2 blue cards. A card is chosen at random from the box. What is the probsbility that it is a green or a blue card?

Answer 1

$|\Omega|=8\\|A|=0+2=2\\\\P(A)=\dfrac{2}{8}=\dfrac{1}{4}=25\%$