Two different numbers are randomly selected from the set S = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}. The probability that the sum of the two numbers is 12 would be greater if the number n had been removed from the set S before the two numbers are selected. What is the value of n?

mathmathj28 Feb 10, 2020