A bag contains 30 black balls and 20 white balls. One ball is drawn at random. What is the probability that the ball drawn is white? Choose one:
A) 2/5
B) 5/7
C) 1/2
D) 1/4
E) 1/3
Total number of balls = 30+20= 
<gadget id="calculator">30+20</gadget>
<output>50</output>
50   no. of white balls= 20   probability of drawing a white ball = 20/50 = 2/5   2/5nswer is 2/5
<result>A</result>
A bag contains 30 black balls and 20 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?