A bag contains 6 blue marbels, 5 red marbles, and 5 green marbles.you choose without looking.what is the probability that it is red or green?

Respuesta :

(5 + 5) / (6 + 5 + 5)
10 / 16
5/ 8
10/16 because there are 16 marbles and there are 5 red and green.