Question

Of 1232 people who came into a blood bank to give blood, 397 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure.

Answer 1

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

answer is 0.175

Answer 2

Probability that the next person who comes in to give blood will have high blood pressure is:

0.3222

Explanation:

Let A be an event

then, P(A)= number of favorable events/total number of events

Here, A: People having high blood pressure

P(A)= number of people having high blood pressure/total number of people

= 397/1232

= 0.3222

Hence, probability that the next person who comes in to give blood will have high blood pressure is:

0.3222