Among employees of a certain firm, 70% know C/C++, 60% know Fortran, and 50%know both languages. What portion of programmers(a) does not know Fortran?(b) does not know Fortran and does not know C/C++?(c) knows C/C++ but not Fortran?(d) knows Fortran but not C/C++?(e) If someone knows Fortran, what is the probability that he/she knows C/C++ too?(f) If someone knows C/C++, what is the probability that he/she knows Fortran too?
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