1. The distribution of blood types for 100 Americans is listed in the table. If one donor is selected at random, find the probability of selecting with blood type A+.
blood type O+ O- A+ A- B+ B- AB+ AB-
number 37 6 34 6 10 2 4 1
The P(A) = 3/5. Find the odds in favor of A.
A group of students were asked if they carry a credit card. The responses are listed in the table.
Class Credit Card carrier Not a Credit Card Carrier Total
Freshman 18 42 60
Sophomore 40 0 40
Total 58 42 100
If a student is selected at random, find the probability that he or she owns a credit card given that the is a sophomore. Round your answer to three decimal places.
Uses Bayes theorem to solve this problem A storeowner purchases steroes from two companies. From Company A, 550 stereos are purchased and 1% are found to be defective. From Company B, 850 stereos are purchased and 6% are found to be defective. Given that a stereo is defective, find the probability that it came from Company A.
The solution provides answers to multiple choice questions on probability.