The following table shows the relationship between students who enroll in advanced Algebra and Chemistry in a particular high school. From a sample of 40 students it is found that 17 are enrolled in Algebra, 12 are enrolled in Chemistry, and six are enrolled in both.

Algebra Not in Algebra Total

Chemistry 6 12

Not in Chemistry

Total 17 40

Complete the rest of the two-way frequency table above.

Part A: How many students are enrolled in either Algebra or Chemistry?

Part B: If there are 2,000 students in this school, how many (rounded to the nearest whole student) are expected to be enrolled in just Chemistry this year?

I already filled out the graph but I think I might have somehow did it wrong.

failurewithasmile
Apr 15, 2017

#1**+2 **

Algebra Not in Algebra Total

Chemistry 6 6 12

Not in Chemistry 11 17 28

Total 17 23 40

Part A

N(Algebra or Chemistry) = N(Algebra) + N(Chemistry) - N(Algebra and Chenistry) =

17 + 12 6 = 23

Part B

Just chemistry = (6/40)*2000 = 300

CPhill
Apr 15, 2017

#2**+1 **

Thank you so much for your help, I feel that I am getting it. Thank you again.

failurewithasmile
Apr 15, 2017