From (1, 2, 3, 4, 5, 6), one number is picked out and replaced and one number is picked out again. If the sum of the 2 numbers is 10, what is the probability that the 2 numbers included the number 5?  Pick one
A) 1/5  B) 2/5  C) 3/10  D) 3/5  E) 1/3
We know that the sum of two numbers picked was 10. So, there could be the following cases:   (4, 6);   (6, 4);   (5, 5);   Total of 3 cases out of which 1 have 5, thus the probability is 1/3.   Ans 1/3
<result>E</result>
From (1, 2, 3, 4, 5, 6), one number is picked out and replaced and one number is picked out again. If the sum of the 2 numbers is 10, what is the probability that the 2 numbers included the number 5?