From a bag containing 12 identical blue balls, y identical yellow balls, and no other balls, one ball will be removed at random. If the probability is less than 2/5 that the removed ball will be blue, what is the least number of yellow balls that must be in the bag?	Choose the correct choice from the following
A) 17
B) 18
C) 19
D) 20
E) 21
12/x = 2/5   x = 30 total number of balls.   There must be at least 18 yellow balls in the bag.   Answer: 18.
<result>B</result>
From a bag containing 12 identical blue balls, y identical yellow balls, and no other balls, one ball will be removed at random. If the probability is less than 2/5 that the removed ball will be blue, what is the least number of yellow balls that must be in the bag?