The mathematics faculty at a college consists of 11 ​professors, 55 associate​ professors,11 assistant​ professors, and 55 instructors. If one faculty member is randomly​ selected, find the probability of choosing a professor or an instructor.

Respuesta :

irspow
P(PorI)=(11+55)/(11+55+11+55)

P(PorI)=66/132

P(PorI)=1/2