A large software development company employs 100 computer programmers. Of them, 45 areproficient in Java, 30 in C, 20 in Python, 6 in C and Java, 1 in Java and Python, 5 in C andPython, and just 1 programmer is proficient in all three languages above. Determine the numberof computer programmers that are not proficient in any of these three languages.

18, 13, 19

Explanation:

Number of computer programmers proficient only in Java = 45 - ( 1+1+6) = 37

Number of computer programmers proficient only in C++ = 30 - (6+1+5) = 18

Number of computer programmers proficient only in python = 20 - ( 1+1+5) = 13

Number of computer programmers are not proficient in any of these three languages = 100 - ( 37 + 18 + 13 + 1+ 1+ 5+ 6 ) = 100 - 81 = 19