Which of the following statements is false? A phenomenon is random if individual outcomes are uncertain.
The probability of any outcome must be a number between 0 and 1.
o A probability can be a number greater than 1
. All possible outcomes together must have probabilities that add up to 1.

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.