Amarble is drawn from a random bag that contains 3green 4yellow 5 blue and 8pink marbles what’s the probability that the marble drawn will be green or blue?

Green:

Blue: or

Combined probability of a green or a blue: or

Step-by-step explanation:

The probabilty of you getting a marble of a given colour is the amount of marbles of the given colour divided by the total amount of marbles.

By using that rule, we get a probabilty o for a green marble, a probabilty of for a blue marble, or if we sum those two and find the probabilty of getting a marble that is either green or blue, we get

Hope it helped,

BioTeacher101