There are 4 red marble, 2 blue marbles, 3 green marbles, and 10 yellow marbles. what is the the probability of drawing a blue or a red marble? (enter as a decimal rounded to 4 places)

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

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get