Question

question 7
the result of a medical test shows that of 32 people selected at random who were given the test, 22 tested negative and 10 tested
positive. determine the odds against a person selected at random from these 32 people testing negative on the test.
a 11:5
b 5:11
c 22:32
d 10:11

Explanation:

Step1: Calculate the number of negative cases

The number of negative cases is \(22\).

Step2: Calculate the number of positive cases

The number of positive cases is \(10\).

Step3: Determine the odds against a positive

Odds against \(=\frac{\text{Number of negative cases}}{\text{Number of positive cases}}\). So, odds against \(=\frac{22}{10}=\frac{11}{5}=11:5\).

Answer:

A. \(11:5\)