A survey was conducted to find out the number of languages spoken by the 210 employees of a company. It was found that

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A survey was conducted to find out the number of languages spoken by the 210 employees of a company. It was found that 60 employees did not speak English, 150 employees did not speak German and 170 employees did not speak French. If there were 20 employees who did not speak German or English and 20 employees who did not speak French or English, what was the maximum number of employees who spoke only English? Assume that each of the employees spoke at least one language and no employee spoke any language other than English, French, and German.

A.110
B.120
C.130
D.140
E.140

Answer: C

Source: e-GMAT