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tiffanyblake

  • 3 years ago

Approximately 15% of Americans have a blood type of B. The local blood bank has 80 donors stop by on a given day (which can be considered a random sample from the population). What is the probability that between 15% and 20% of the donors on a given day have a blood type of B? Be sure to state and justify your assumptions.

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  1. AbhimanyuPudi
    • 3 years ago
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    1/3?? 15% of 80 is 12. So 12 donors have B blood type. Between 15%(12) to 20%(16), there are four members. So probability that these four members are in those 12 B blood type donors is 4/12 = 1/3

  2. AbhimanyuPudi
    • 3 years ago
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    I really think it's 1/3

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