A civic group is selling bumper stickers as a fundraiser. During the first week, they sold 500 bumper stickers. During the second week, the group sold 50% more bumper stickers than the first week. During the third week, the group sold 50% fewer bumper stickers than the second week. Explain how you can use proportions to find the percent decrease from the first week's sales to the third week's sales.

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.