Aspinner used for a game is divided into 4 sections: yellow, brown, red, and orange. janie spins the spinner 20 times. the spinner lands on brown 6 times. what is the experimental probability that the spinner does not land on brown? a.1/5 b.3/10 c.7/10 d.4/5

Anyone know? is appreciated! will mark brainliest if correct!

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.

Find cot x if sin x cot x csc x = √2