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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.

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  1. 3 April, 16:10
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    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
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