The sum of 112cx, 3c, -12cx, and 70
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The number of students in the survey said that math was their favorite subject is given by: Option D: 123
<h3>What is conditional relative frequency?</h3>Conditional relative frequency is relative frequency conditional to some special characteristic.
For this case, we're specified the following table:
It is given that:
- the survey was given to 120 male students and
- the survey was given to 180 female students
We have to find how many students in the survey said that math was their favorite subject.
From males, 0.35 out of 1 male said math was their favorite subject. (since total in male is 1, showing that the row of males got conditional relative frequency conditional to the gender male, and relative to the total count of males).
Thus, as out of 1, there was 0.35 supporter of math (from males), so from 120 male students, there were male students who had chosen math as their favorite subject.
Similarly, 0.45 per 1 female student chose their favorite subject as math.
Since there are 180 female students, therefore, total female students had chosen math as their favorite subject.
So, total 42+81=123 students had chosen math as their favorite subject.
Thus, the number of students in the survey said that math was their favorite subject is given by: Option D: 123
Learn more about conditional relative frequency here: