Question: 2. (& ) There are 100 presentations at an academic conference . Of these : . 50 are boring, . 40 are pompous, . 20

2. (& ) There are 100 presentations at an
2. (& ) There are 100 presentations at an academic conference . Of these : . 50 are boring, . 40 are pompous, . 20 are wrong , . 14 are boring and pompous, . 13 are boring and wrong, . 15 are pompous and wrong, . 12 are boring, pompous and wrong. How many presentations are not boring, not pompous, and not wrong

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