There are 35 red marbles, 8 blue marbles, and 7 green marbles in a bag. several trials are performed with the results shown in the table. what is the experimental probability of randomly drawing a red marble?

red =72 blue = 26 green = 22

66.7%
72%
60%
70%

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.

Secant be and cf intersect at point d inside a what is the measure of cde