Below are the survey results of 60 students out of 1250 students in a school. These results are representative of the school population.
number answering yes
Do you work on weekends 31
Do you spend 2 or more 36
hours per nigh on hw?
Do you buy lunch in the
cafeteria? 48

Predict the number of students in the school who work on the weekends

Predict the number of students in the school who buy lunch in the school cafeteria

Question

Below are the survey results of 60 students out of 1250 students in a school. These results are representative of the school population.
                                         number answering yes
Do you work on weekends              31
Do you spend 2 or more                 36
hours per nigh on hw?                   
Do you buy lunch in the
cafeteria?                                        48

Predict the number of students in the school who work on the weekends

Predict the number of students in the school who buy lunch in the school cafeteria

anonymous · Answer

@phi

phi · Answer

you could use ratios
# working on weekends / total in sample  =  # working on weekends in whole school/# in school
$$ \frac{ 31}{60}= \frac{x}{1250} $$
solve for x by multiplying both sides by 1250 and simplifying

use that same idea (but different numbers) for part B