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Problems
Contests
National and Regional Contests
USA Contests
MAA AMC
AMC 8
1990 AMC 8
14
14
Part of
1990 AMC 8
Problems
(1)
Number Of Balls
Source:
6/27/2011
A bag contains only blue balls and green balls. There are
6
6
6
blue balls. If the probability of drawing a blue ball at random from this bag is
1
4
\frac{1}{4}
4
1
, then the number of green balls in the bag is
(A)
12
(B)
18
(C)
24
(D)
30
(E)
36
\text{(A)}\ 12\qquad\text{(B)}\ 18\qquad\text{(C)}\ 24\qquad\text{(D)}\ 30\qquad\text{(E)}\ 36
(A)
12
(B)
18
(C)
24
(D)
30
(E)
36
probability