Question

In a group of 40 people, 10 are healthy and the remaining 30 have either high blood pressure or high cholesterol or both. If 15 have high blood pressure and 25 have high cholesterol, how many people have

a) High blood pressure only?

b) High level of cholesterol only?

c) Either high blood pressure OR high cholesterol levels?

d) Both high blood pressure AND high cholesterol?

e) Use the above to check the probability formula: P(A or B)=P(A)+P(B)-P(A and B)

Answer 1

Answer:

a) 15 people

b) 25 people

c) 30 people

d) 15 + 25 - 30 = 10 people

e) P(AorB) = P(A) + P(B) - P(A and B)

   => 10 = 15 +25 - 30

   =>  10 = 10 , therefore formula is valid

Answer 2

Benefits of eating oranges.

▪︎High in Vitamin C. Oranges are an excellent ▪︎source of vitamin C. ...

▪︎Healthy immune system. ...

▪︎Prevents skin damage. ...

▪︎Keeps blood pressure under check. ...

▪︎Lowers cholesterol. ...

▪︎Controls blood sugar level. ...

▪︎Lowers the risk of cancer.