A store has 10 bottles of juice, including 5 bottles of apple juice. In the evening, 6 bottles of juice are sold one by one. What is the probability of selling 4 bottles of apple juice among the 6 bottles? Assume that every bottle has an equal chance of being bought.	Choose the correct choice
A) 2/7	B) 3/11	C) 4/15	D) 5/21	E) 6/25
The total number of ways to sell 6 bottles from 10 is 10C6 = 210.   The number of ways to sell 4 bottles of apple juice is 5C4*5C2 = 5*10= 
<gadget id="calculator">5*10</gadget>
<output>50</output>
50   P(selling 4 bottles of apple juice)= 50/210 = 5/21   The answer is 5/21.
<result>D</result>
A store has 10 bottles of juice, including 5 bottles of apple juice. In the evening, 6 bottles of juice are sold one by one. What is the probability of selling 4 bottles of apple juice among the 6 bottles? Assume that every bottle has an equal chance of being bought.