Find the Probability?

Question

In Hi-tense City, 35% of adults have high blood pressure or high cholesterol. One out of every four people has high blood pressure, and one out of every five has high cholesterol.
Find the probability that a person chosen at random will have both high blood pressure and high cholesterol. Express your answer as a decimal.

Answer 1

35% have either HBP or HC

25% have HBP

20% have HC

If 35% have either HBP or HC, then 5% [(25%+20%-35%)/2] have both.

 

0.05