Aaron puts several cards face down on the table. He draws one card, records the result, and then places the card back on the table face down. The results of his experiment are shown below. Based on the results, what is the probability of choosing a 10 or Jack from the cards?

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.