Roll the number cube to find the observed frequency Roll the number cube 20 times to represent 20
purchases. What is the experimental probability of
receiving a 50% coupon? Write the probability as a
decimal
Number
Discount
Observed
Frequency
0
0
OWN
2
3
4
5
10%
20%
25%
30%
50%
75%
ololololo
0
Total
Roll one time.

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.