If you select two cards from a pile of cards numbered 1 to 10, what is the probability that the sum of the numbers is less than 6?
Select the correct option:  A) 1/45  B) 2/45  C) 4/45  D) 2/15  E) 1/5
The number of ways to choose two cards is 10C2=45.   There are 4 ways, {1,2},{1,3}, {1,4} and {2,3}, to get a sum less than 6.   P(sum less than 6)=4/45   The answer is 4/45.
<result>C</result>
If you select two cards from a pile of cards numbered 1 to 10, what is the probability that the sum of the numbers is less than 6?