The probability that a given 20-35 year old survives a givenviral infection is 99%. • The probability that a given 65-80 yearold survives the same viral infection is 95%. • In a group of 2020-to-35-year-olds with the viral infection, what is theprobability that all 20 will survive? • In a group of 2065-to-80-year-olds with the infection, what is the probability thatall 20 will survive?
