Question

From a barrel of colored marbles , you randomly select 5 blue , 2 yellow , 3 red , 4 green , and 2 purple marbles. Find the expreimetal probability of randomly selecting a marble that is NOT yellow .

1. 9 / 16
2. 7 / 8
3. 8 / 9
4. 3 / 4

Answer 1

4/5

Explanation:

From your experiment of drawing 20 marbles you now have a proportion of non-yellow marbles to total marbles and from that you can come up with an experimental probability that you'll draw a non-yellow marble.

P(not yellow) = 16/20

But that can be reduced by dividing top and bottom by 4:

Answer 2

I think it's 7/8 because there's 16 marbles and 14 aren't blue so you have a 14/16 chance of not getting a yellow marble which simplifies to 7/8