In a box, there are 8 orange, 7 black and 6 white balls. If one ball is picked up randomly. What is the probability that it is neither orange nor white? Choose the most appropriate option.
A) 2/3 B) 3/4 C) 7/19 D) 8/21 E) 10/21
total balls are 21   and neither black nor white .   so favor case will be only 8C1   and total case 21C1   probability will be 8C1/21C1=8/21   ANSWER:8/21
<result>D</result>
In a box, there are 8 orange, 7 black and 6 white balls. If one ball is picked up randomly. What is the probability that it is neither orange nor white?