Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.
| rev | Admin | (Created page with "'''Solution: A''' The number of subsets of size <math>k</math> containing the answer equals <math>\binom{3}{k-1}</math> and the points associated with each such subset is <math>4-k</math>. The number of subsets of size <math>k</math> not containing the answer equals <math>\binom{3}{k}</math> and the points associated with each such subset equals <math>-k</math>. Hence the expected value equals <math display = "block"> \sum_{k=1}^4 (4-k) \binom{3}{k-1} - \sum_{k=1}^4 k...") | Jun 26'24 at 1:21 | +913 |