If three numbers are randomly selected from a set, what is the probability that sum will be greater than 18 if he given set is
{5,6,7,8,9,10}	Choose the correct choice from the following answers
A) 7/18
B) 5/13
C) 5/16
D) 5/19
E) 5/9
First problem is 6C3 = 18 .. Not 20..   Point 2, your sum should be greater than 18, so these are the following possibilities you have   ({5,7,8},{5,9,10},{6,7,8},{6,9,10},{8,9,10}) which leads to 5 combinations   So the probability is 5 on 18 or 5/18..   ANSWER:5/19
<result>D</result>
If three numbers are randomly selected from a set, what is the probability that sum will be greater than 18 if he given set is
{5,6,7,8,9,10}