Answer: D. 0.322
Step-by-step explanation:
Given : Of 1232 people who came into a blood bank to give blood, 397 people had high blood pressure.
Then, the probability that the next person who comes in to give blood will have high blood pressure will be :_
[tex]\dfrac{\text{People had high blood pressure}}{\text{Total people}}\\\\=\dfrac{397}{1232}\\\\=0.32224025974\approx0.322[/tex]
Hence, the estimated probability that the next person who comes in to give blood will have high blood pressure = 0.322