A bag contains five white and four red balls. Two balls are picked at random from the bag. What is the probability that they both are different color? Choose the correct choice from the following.
A) 1/9	B) 5/9	C) 7/9	D) 7/11	E) None
Explanation:   Two balls can be picked from nine balls in ⁹C₂ ways.   We select one white ball and one red ball from five white balls and four red balls. This can be done ⁵C₁ . ⁴C₁ ways.   The required probability = (5 * 4)/⁹C₂ = 20/36 = 5/9   5/9)
<result>B</result>
A bag contains five white and four red balls. Two balls are picked at random from the bag. What is the probability that they both are different color?