6. 1000 fish in one of the lakes of Ontario were caught and tagged by the Department of Fisheries. After a while a new catch of 500 fish was caught and it was found that 60 among them had tags. Estimate the number of fish in the lake. 7. At the Statsville County Fair, there is a 20% chance of winning a prize in the ring-toss game. If someone plays the ring toss game 20 times, what is the probability that they will win a prize exactly 5 times