In a bag there are a certain number of red balls and blue balls. The probability of picking up exactly 1 blue ball when 2 balls are randomly drawn, is 1/2. Which of the following is the ratio of the number of red balls to blue balls in the bag	Pick.
A) 5:1
B) 1:6
C) 1:4
D) 1:46
E) 1:1
since the probability of drawing a blue ball out of two picks is 1/2.   the ratio of the blue ball to red balls should be 1:1   Answer : 1:1
<result>E</result>
In a bag there are a certain number of red balls and blue balls. The probability of picking up exactly 1 blue ball when 2 balls are randomly drawn, is 1/2. Which of the following is the ratio of the number of red balls to blue balls in the bag