To determine the probability that a person who is above 35 years old has a hemoglobin level of 9 or above, we will follow these steps:
1. Identify the total number of people above 35 years old:
According to the table, the total number of people above 35 years old is 162.
2. Identify the number of people above 35 years old with a hemoglobin level of less than 9:
According to the table, the number of people above 35 years old with a hemoglobin level of less than 9 is 76.
3. Calculate the number of people above 35 years old with a hemoglobin level of 9 or above:
To determine this, subtract the number of people with a hemoglobin level of less than 9 from the total number of people above 35 years old:
[tex]\[
\text{Number of people with hemoglobin level of 9 or above} = \text{Total above 35} - \text{Hemoglobin less than 9}
\][/tex]
[tex]\[
\text{Number of people with hemoglobin level of 9 or above} = 162 - 76 = 86
\][/tex]
4. Calculate the probability:
The probability is calculated as the number of people above 35 years old with a hemoglobin level of 9 or above divided by the total number of people above 35 years old:
[tex]\[
\text{Probability} = \frac{\text{Number of people with hemoglobin level of 9 or above}}{\text{Total above 35}}
\][/tex]
[tex]\[
\text{Probability} = \frac{86}{162} \approx 0.531
\][/tex]
Therefore, the probability that a person who is above 35 years old has a hemoglobin level of 9 or above is approximately 0.531.
The correct answer is:
C. 0.531
