Question

Use table for parts A-D

Blood-type distributions by proportion for a sample of people in Australia and Finland.   

	Proportions
Blood Type	Australia	Finland	Total
O	245	155	400
A	190	220	410
B	50	85	135
AB	15	40	55
Total	500	500	1000

A) The probability that a person in the sample has AB blood type is

i) 0.015              ii) 0.04              iii) 0.055            iv) 0.55

B) The probability that a person in the sample has AB blood type is

i) 0.015              ii) 0.04              iii) 0.055            iv) 0.55

C) What is the probability that a person is blood type 0 or from Finland?
i) 0.155       ii) 0.31       iii) 0.3875   iv) 0.745

D) The conditional probability that a person is type B given that we already know they are from Australia is
i) 0.05       ii) 0.1       iii) 0.238   iv) 0.379

Answer 1