Richard throws a dart at a target. He assumes that each throw is independent and that the probability he hits the target is 15\displaystyle \frac{1}{5}51. Richard throws 8 darts.
Calculate the probability of at least 3 of these darts hitting the target.
Richard throws 8 darts at the target each day for 3 days. Calculate the probability that at least 3 darts hit the target for exactly 1 of these days.