A survey of 100 students at New England College showed the following: 45 take English. 47 take history. 39 take language. 13 take English and history. 15 take English and language. 18 take history and language. 7 take all three. How many students do the following? (See Example 6.) (a) Take history but neither of the other two? X students (b) Take English and history but not language? X students (c) Take none of the three? X students

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