Jerry started doing sit ups every day. the first day he did 15 sit ups. every day after that he did 2 more sit ups than he had done the previous day. today jerry did to 33 sit ups. write an equation that could be solved to find the number of days jerry has been doing sit ups, not counting the first day.
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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.