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OpenStudy (anonymous):

Direction : A survey is conducted on 800 software engineers. It was found that 45.625% of them know C# language, 56.875% of them know VB and 47.5% know Java. The percentage of software engineers who know C# and VB but not Java is 17.5%, and those who know VB and Java but not C# are 15.625%. The percentage of software engineers who know C# and Java but not VB is 9.375%. Answer the following questions based on this information. Q : How many software engineers know all the three languages ?

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