A store has 10 bottles of juice, including 6 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 one.
A) 2/5
B) 3/5
C) 2/3
D) 1/2
E) 3/7
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 6C4*4C2 = 15*6= 
<gadget id="calculator">15*6</gadget>
<output>90</output>
90   P(selling 4 bottles of apple juice)= 90/210 = 9/21 = 3/7   The answer is 3/7.
<result>E</result>
A store has 10 bottles of juice, including 6 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.