What is the probability that a person who is above 35 years old has a hemoglobin level of 9 or above?
a.
0.357
b.
0.313
c.
0.531
d.
0.343
e.
0.432

Option C.

Step-by-step explanation:

we know that

The probability of an event is the ratio of the size of the event space to the size of the sample space.  

The size of the sample space is the total number of possible outcomes  

The event space is the number of outcomes in the event you are interested in.  

so  

Let

x------> size of the event space  (total person's hemoglobin level of 9 or above with age above 35 years)

y-----> size of the sample space  (total person's age above 35 years)

so

In this problem we have

Complete the table to find the total person's hemoglobin level of 9 or above (person's age above 35)

Let

y------> total person's hemoglobin level between 9 and 11 (person's age above 35)

Find the value of x

substitute the values

answer: a.

step-by-step explanation: the answer is a. because, you need to converge the fractions to find a solution.