Question
On the two subjects offered to a class in their final
year, 32 students in all are studying psychology while a total of 26 students are studying sociology. If 16 students have opted to specialize in both, what is the strength of the class?Solution
ATQ,
Given: Students studying Psychology (P) = 32 Students studying Sociology (S) = 26 Students studying both = 16 We use the formula for union of two sets: Total students=P+S−Both =32+26−16 = 42
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34 : 408
