probability of blood pressure

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Estimate the probability of the event.Of 1950 people who came into a blood bank to give blood, 339 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure.

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Explanation & Answer

Thank you for the opportunity to help you with your question!

By the word "estimate", I'm assuming you can't just use a calculator, so I'll try to do this in my head for you.

What you want is to figure out how big a portion 339 is of 1950.
  339 / 1950

I'm going to round these numbers to make them easier to work with. We will get an approximate answer.
350 / 2000
= 35 / 200
= 3.5 / 20
= 0.35 / 2
= 0.175

The closest answer to our approximation is 0.172, therefore I would guess that to be the answer.
Using a calculator to check my answer, 339 / 1950 = 0.173

Please let me know if you need any clarification. I'm always happy to answer your questions.

ivpxl qnivq (178)
Duke University

This is great! Exactly what I wanted.

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