Blood Only 4% of people have Type AB blood.a) On average, how many donors must be checked to findsomeone with Type AB blood?b) What’s the probability that there is a Type AB donoramong the first 5 people checked?c) What’s the probability that the first Type AB donorwill be found among the first 6 people?d) What’s the probability that we won’t find a Type ABdonor before the 10th person?

2. It has been found that 80% of all solar power packages work properly at the time of installation. The rest require some adjustment. A particular company sells 10 packages a month. a) Find the probability that at least 9 of the packages work properly upon installation. b) Consider 5 months in which 10 packages are sold each month. What is the probability that at least 9 packages work properly in each of the 5 months?

A pathogen affects 1 person out of every 100 people. Suppose you come into contact with 40 randomly selected people in one day? 1. What is the probability that at least one of these 40 people is infected? 2. What is the probability that at least 2 out of the 40 randomly selected people are affected?

Community colleges are studying the retention rate of first-year students. It was determined 20 percent of the first-year students don't return. The school contacts 12 students and they all agree to answer a survey given to them by the school.  1) What is the probability that exactly four students do not return after their first year? 2)What is the probability that 1-2 students don not return after the first year? 3) What is the probability that at least five or more students do not return after their first year?

I roll an ordinary, six-sided die eight times in a row, what is the probability that at least six of those rolls have a value of 1 or 6?