A bag contains 7 red marbles, 12 orange marbles, 18 yellow marbles, and 5 purple marbles. A marble is drawn at random from the bag.

What is the probability that the marble drawn will not be orange?

Question

A bag contains 7 red marbles, 12 orange marbles, 18 yellow marbles, and 5 purple marbles. A marble is drawn at random from the bag. 
 
What is the probability that the marble drawn will not be orange?

anonymous · Answer

A.2/7
B.1/12
C.5/7
D.1/30

y1066380 · Answer

Total number of marbles=7+12+18+5=42
Number of orange marbles=12
So, by using the equation "favorable outcome / possible outcome"
You will have 12/42=2/7
You will get the ans A.

anonymous · Answer

Add the total amount of marbles

anonymous · Answer

Thanks to both of yous :)