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?

jadeishere · Answer

15:21, someone just asked this earlier >.< 
altogether there are 42 marbles, there are 30 other marbles not colored orange, 30:42 simplified is 15:21

anonymous · Answer

find probability of drawing red marble from bag
and then yellow and purple
add three of them