Question

A researcher conducted a survey of 6 teachers to determine how many times each teacher tutors students after school. The researcher recorded the findings in the table below.
​Teacher ​Number of Outcomes
1 ​18
2 ​ 15
3 ​12
4 ​23
5 ​ 15
6 ​ 19
Total ​100
What is the empirical probability that teacher #4 will tutor students after school?
I'd say 100%, since the teacher clearly tutors after school.
What you should have asked is what is the percentage of tutoring events were conducted by Teacher #4. That would be
23/100 = 23%
Ms. Poole, my PE teacher, asked the 100 seventh in my school if they could swim. Half the boys and two thirds of the girls said yes. Seventeen boys said no. How many seventh graders know how to swim?

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