Flora and Ed will throw five dice each. The score is the sum of points on all five dice. If Flora scores 17 in her attempt, what is the probability that Ed will outscore Flora in his attempt?
Choose the correct answer.
A) 3/4  B) 2/3  C) 1/2  D) 1/3  E) 1/4
The expected value of each die is 3.5 points.   The expected value of 5 dice is 5*3.5= 
<gadget id="calculator">5*3.5</gadget>
<output>17.5</output>
17.5 points.   Since this is the expected value, Ed is equally likely to get a score above 17.5 points as below 17.5 points. Then the probability of scoring 18 or more points is 50%.   P(Ed wins)=1/2   The answer is 1/2.
<result>C</result>
Flora and Ed will throw five dice each. The score is the sum of points on all five dice. If Flora scores 17 in her attempt, what is the probability that Ed will outscore Flora in his attempt?