In a box, there are 20 red, 15 blue and 10 green balls. One ball is picked up randomly. What is the probability that it is green?
Choose the correct choice from the following options.
A) 1/3
B) 2/5
C) 3/7
D) 2/9
E) 1/5
Total number of balls = 20+15+10= 
<gadget id="calculator">20+15+10</gadget>
<output>45</output>
45   E= event that the ball drawn is green = 10   n(E) = 10   P(E) = 10/45 = 2/9   Answer is 2/9
<result>D</result>
In a box, there are 20 red, 15 blue and 10 green balls. One ball is picked up randomly. What is the probability that it is green?