Answer:
P(red or blue) = 0.3158
Step-by-step explanation:
There are 19 total marbles. Want one that is red or blue, there are 6 marbles that are either red or blue. We are just choosing one marble, so we can use the fraction
6/19 to represent our situation (there are 6 ways we can be successful, meaning drawing a blue or red marble, out of the 19 different ways we can draw one marble)
6/19 = 0.315789474, which rounds to 0.3158