A bag contains 5 green marbles, 3 blue marbles, 2 red marbles, 4 purple marbles, and 1 black marble. What is the probability that you draw a black OR purple marble?

Question

represent your answer as a percent rounded to the nearest tenth if necessary. 

Answer 1

The probability of an event is equal to the number of ways an event can happen divided by the number of ways anything in this universe can happen. In this case:

1 black or 4 purples (1 draw, 5 possibilities) out of 15 possible draws = 1/3