12. 100 university students were interviewed. 28 took Partial Differential Equations (PDE), 31 took Bio, 42 took English, 9 took PDE and Bio, 10 took PDE and English, 6 took Bio and English, 4 took all three subjects. (a) How many students took none of the three subjects? (b) How many students took PDE, but NOT Bio or English? (c) How many took Bio and PDE but NOT English?

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12. 100 university students were interviewed. 28 took Partial Differential Equations (PDE),
31 took Bio, 42 took English, 9 took PDE and Bio, 10 took PDE and English, 6 took Bio
and English, 4 took all three subjects.
(a) How many students took none of the three subjects?
(b) How many students took PDE, but NOT Bio or English?
(c) How many took Bio and PDE but NOT English?
Transcribed Image Text:12. 100 university students were interviewed. 28 took Partial Differential Equations (PDE), 31 took Bio, 42 took English, 9 took PDE and Bio, 10 took PDE and English, 6 took Bio and English, 4 took all three subjects. (a) How many students took none of the three subjects? (b) How many students took PDE, but NOT Bio or English? (c) How many took Bio and PDE but NOT English?
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