Question

Noah has a bag of 30 marbles. Of these marbles 8 are blue, 9 are red, and the rest are clear. What is the probability that a marble taken from the bag will not be red?

Answer 1

`9/10`

Explanation:

We can figure out the probability of drawing a red marble and then subtract that from 1:

`P("red")=9/30=3/10`

`:. P("not red")=1-3/10=9/10`