Question

A survey of 800 students yielded the following information: 519 were seniors, 430 were commuters, and 300 of the seniors were commuters. How many of the 800 surveyed students were seniors or were commuters?

Answer 1

Answer:

The number is  $(S \ u \ C ) = 649$

Step-by-step explanation:

From the question we are told that  

      The sample size is  n =  800

       The number of seniors is  S  =  519

         The number of  commuters is  C =  430

         The number of of seniors that are commuters is  $(S\ n \ C )= 300$

Generally the number of 800 surveyed students who were seniors or were commuters is  mathematically evaluated as

     $(S \ u \ C ) = S + C - ( S \ n \ C )$

=>   $(S \ u \ C ) = 519 + 430 - 300$

=>   $(S \ u \ C ) = 649$