A bag contains only blue balls and green balls. There are 6 blue balls. If the probability of drawing a blue ball at random from this bag is \dfrac{1}{4}, then the number of green balls in the bag is
Answer Choices
A. 12
B. 18
C. 24
D. 30
E. 36
A bag contains only blue balls and green balls. There are 6 blue balls. If the probability of drawing a blue ball at random from this bag is \dfrac{1}{4}, then the number of green balls in the bag is
Answer Choices
A. 12
B. 18
C. 24
D. 30
E. 36