There are 60 office suites in a downtown building. for how many office suites does company c service the computers? -company a services the computers at 1/3 of the office suites -company b services the computers at 2/5 of the office suites

Company C services 16 office suites.

Company A services 1/3 of the suites and Company B services 2/5; together they service 1/3+2/5.  Find a common denominator; 15 is the smallest:

1/3=5/15
2/5=6/15

5/15+6/15 = 11/15

This means that 1-11/15 = 4/15 of the suites are serviced by Company C.

4/15 of 60 = 4/15(60) = 4/15(60/1) = 240/15 = 16