Conditional probability from exact representations
A collection of paper samples is classified by two features
One of the listed outcomes or recorded items is selected uniformly at random
Let A be the event that the paper is folded, and let B be the event that the paper has a square mark. The sample space is S
The sample space S contains the whole-number labels 1 to 15, inclusive
\[A = \{1, 2, 7, 8, 9, 10, 11, 12\}\]
\[B = \{3, 4, 5, 6, 7, 8, 9, 10, 11, 12\}\]