There are 10 yellow cards, 6 green, 9 orange, and 5 red cards. Once a card is selected it is REPLACED! What is the Probability of drawing a yellow card first and then a green card second?

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?

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.

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9