Answer to Question #245570 in Statistics and Probability for Icy

Question

The table below shows the numbers of different types of power stations being operated in four countries.

Coal Nuclear Hydroelectric

China 38 10 68

Finland 2 2 x

Germany 32 23 7

Japan 4 21 63

(a) If a nuclear power station is selected at random, what is the probability that it was from Japan?

(b) If two power stations are selected from either China or Japan, what is the probability that none of them are coal-generated?

(c) Let PC and PH be the events “Power station is from China” and “The power station is hydroelectric”, respectively. How many hydroelectric power stations are there in Finland if PC and PH are independent events?