Question

2. Human blood is grouped into four types. The percentages of Americans with each type are: Type O 43%, 40%, B 12%, AB 5% Choose one American at random. Find the probability that this person: has type O blood has type A or B blood has type A and type B blood How many different ways can 4 tickets be selected from 10 tickets if each ticket wins a different prize? What if each ticket wins the same prize? If you have 6 t-shirts, 3 pairs of pants, and 5 pairs of shoes, how many different outfits can you create? 6. Box 1 contains 2 red balls and 1 blue ball. Box 2 contains 3 blue balls and 1 red ball. A coin is tossed. Ifit falls heads up, box 1 is selected and a bal is drawn. If it falls tails up, box 2 is selected and a bal is drawn. Find the probability of selecting a red ball. (Hint: a tree diagram may help)

Answer 1

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