A lake contains 100 sh, 20 of which have been tagged as part of a study. Four sh are chosen at random (without replacement for parts a, b and c) from the lake. Find the chances of each of the following events. Express your answers as percentages, rounding to the nearest hundredth of a percent. (a) All of the chosen sh are tagged. Answer: % (b) None of the chosen sh are tagged. Answer: % (c) At least two of the chosen sh are tagged. Answer: % (d) If I were to choose the sh with replacement (After choosing a sh, I would put it back in the lake). What's the probability that the second sh is the same as the rst sh I chose? Answer: %