A Box Contains 10 Tags Numbered 1 Through 10 40+ Pages Solution [725kb] - Updated 2021

A Box Contains 10 Tags Numbered 1 Through 10 40+ Pages Solution [725kb] - Updated 2021

70+ pages a box contains 10 tags numbered 1 through 10 1.5mb. What is the expected value of the sum of the numbers on the two selected tags...