Question

answer the question based on the data in the table.

hemoglobin level	persons age
less than 9	21	32	76	129
between 9 and 11	49	52
above 11	69		40
total	139	128	162	429

11
select the correct answer.
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

Explanation:

Step1: Find missing value for Above 35, 9-11

Total for Above 35 years is 162. Subtract the other two values in that column:
$162 - 76 - 40 = 46$

Step2: Calculate total hemoglobin ≥9 for Above 35

Sum the values for "Between 9 and 11" and "Above 11" in the Above 35 column:
$46 + 40 = 86$

Step3: Compute the probability

Divide the total from Step2 by the total number of people above 35:
$\frac{86}{162} \approx 0.531$

Answer:

C. 0.531