An archer has a 90% chance of hitting a target with arrows. If 5 arrows are fired, determine the chance of hitting the target: a) twice only 0.0081 b) at most 3 times 0.08146 Please find the correct answers. The ones above aren't right. The annual income and average weekly grocery bill for a selection of families is shown below. Income (x thousand pounds) 55 36 25 47 60 64 42 50 Grocery bill (y pounds) 120 90 60 160 190 250 110 150 Find the regression line of y against x. Suppose X is normally distributed with mean 60 and standard deviation 5. Find P(X264)