From a barrel of colored marbles, you randomly select 6 blue, 4 yellow, 2 red, 3 green, and 5 purple marbles. Find the experiment probability of randomly selecting a marble that is not yellow.
A.2/9
B.4/5
C.2/3
D.10/19
There are a total of 6+4+2+3+5 = 20 marbles. The number of marbles that are not yellow is 20-4 = 16.
So, the experiment probability of randomly selecting a marble that is not yellow is:
P(not yellow) = 16/20 = 4/5
Therefore, the answer is B.4/5.