+0  
 
0
243
2
avatar+117 

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
Sort: 

2+0 Answers

 #1
avatar+77125 
+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

 

 

cool cool cool

CPhill  Apr 15, 2017
 #2
avatar+117 
+1

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

failurewithasmile  Apr 15, 2017

17 Online Users

avatar
avatar
avatar
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details