A bag contains nine white and four red balls. Two balls are picked at random from the bag. What is the probability that they both are different color? Options
A) 5/8
B) 6/13
C) 5/16
D) 5/13
E) 5/11
Two balls can be picked from thirteen balls in 13Câ‚‚ ways.   We select one white ball and one red ball from five white balls and four red balls. This can be done âµ ways.   The required probability = (9 * 4)= 
<gadget id="calculator">(9 * 4)</gadget>
<output>36</output>
36/78= 6/13   Answer: 6/13
<result>B</result>
A bag contains nine white and four red balls. Two balls are picked at random from the bag. What is the probability that they both are different color?