You have a bag with 20 marbles 2 yellow 5 green 12 red and 1 blue which of the following statements are true? Select all that apply. a) The probability of choosing a yellow, green, red, or blue marble is 1 b) The probability of choosing a yellow marble is less than the probability of choosing a blue marble c) The probability of choosing a green marble is 0.25 d) The probability of choosing a black marble is zero

There are two major tests of readiness for college: the act and the sat. act scores are reported on a scale from 1 to 36. the distribution of act scores in recent years has been roughly normal with mean µ = 20.9 and standard deviation s = 4.8. sat scores are reported on a scale from 400 to 1600. sat scores have been roughly normal with mean µ = 1026 and standard deviation s = 209. reports on a student's act or sat usually give the percentile as well as the actual score. the percentile is just the cumulative proportion stated as a percent: the percent of all scores that were lower than this one. tanya scores 1260 on the sat. what is her percentile (± 1)?