If one of the 255 subjects is randomly selected, find the probability that the person is over 40 and prefers cola.
1 answer:
The probability that the person is over 40 and prefers cola exists at 1.3725.
<h3>What is probability?</h3>The probability of an event exists in the ratio of the size of the event space to the size of the sample space.
The size of the sample space exists the entire number of possible outcomes.
The event space exists the number of outcomes in the event you exists interested in.
So, P = size of the event space/size of the sample space
To estimate the probability that the person exists over 40 years.
Size of the sample size = 255
Size of the event space = 85
P = 85/255
P = 1/3
To estimate the probability that they drink cola.
Size of the sample size = 255
Size of the event space = 95
P = 95/255
P = 19/51
To estimate the probability that the person exists over 40 years of age or that they drink cola
So, P = (1/3) + (19/51)
P = 1.3725
Therefore, the probability that the person is over 40 and prefers cola exists at 1.3725.
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