Probability questions

Question

A box is filled with 5 green cards, 6 blue cards, and 5 red cards. A card is chosen at random from the box. What is the probability that it is a green or red card?

Answer 1

P(green or red) = P (green) + P (red)

P(green or red) = 5/16 + 5/16 = 10/16 = 5/8

The probability is 5/8 that it is a green or red card.

Answer 2

What you want / Total cards

5 Green + 5 red / 5 Green+ 5 Red + 6 Blue= 10/16 = 5/8