Ajar contains 12 blue pens, 7 black pens, and 3 red pens. marco picks two red pens at random, without replacement. which product represents the probability that both of marco’s choices will be red pens? a) 3/22 x 2/22 b) 3/22 x 2/21 c) 3/22 x 3/21 d) 3/22 x 3/22

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.