What is the probability

Question

A box is filled with 6 red cards, 6 Brown cards, and 8 blue cards. A card is chosen at random from the box. What is the probability that it is a red or blue card

Answer 1

Probability = number of events/the number of possible outcomes

In this problem this translates to:

(red+blue cards)/(total cards)

(6+8)/(6+6+8) = 14/20 = 0.70