Answer:
1. The probability that a person who is older than 35 years has a hemoglobin level between 9 and 11 is 0.284.
2. The probability that a person who is older than 35 years has a hemoglobin level of 9 and above is 0.531.
Step-by-step explanation:
Let the number of person who is older than 35 years has a hemoglobin level between 9 and 11 be x.
From the given table it is clear that the total number of person who is older than 35 years is 162.
[tex]76+x+40=162[/tex]
[tex]x+116=162[/tex]
[tex]x=162-116[/tex]
[tex]x=46[/tex]
The number of person who is older than 35 years has a hemoglobin level between 9 and 11 is 46.
1.
The probability that a person who is older than 35 years has a hemoglobin level between 9 and 11 is
[tex]P=\frac{\text{Person who is older than 35 years has a hemoglobin level between 9 and 11}}{\text{Person who is older than 35 years}}[/tex]
[tex]P=\frac{46}{162}\approx 0.284[/tex]
The probability that a person who is older than 35 years has a hemoglobin level between 9 and 11 is 0.284.
2.
Person who is older than 35 years has a hemoglobin level of 9 and above is
[tex]46+40=86[/tex]
The probability that a person who is older than 35 years has a hemoglobin level of 9 and above is
[tex]P=\frac{\text{Person who is older than 35 years has a hemoglobin level of 9 and above}}{\text{Person who is older than 35 years}}[/tex]
[tex]P=\frac{86}{162}\approx 0.531[/tex]
The probability that a person who is older than 35 years has a hemoglobin level of 9 and above is 0.531.
