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This should be an easy question?
Of 270 students studying science:
64 have taken a computer science unit;
94 have taken a maths unit;
58 have taken a physics unit;
26 have taken a computer science unit and a maths unit;
28 have taken a computer science unit and a physics unit;
22 have taken a maths unit and a physics unit;
14 have taken a computer science, maths, and a physics unit.
How many if the students have not taken any unit in computer science, maths or physics?
2 Answers
- Anonymous8 years ago
make a venn diagram of 3 circles and all interlocking spaces
then fill out all spaces:
22 - 14 have taken maths and physics, but not computer science and so on...
in the end you'll find out that 154 persons did any of math OR physics OR computer science
so 270-154 = 116 students must have done something different
- Anonymous8 years ago
None