A U, is called the union, means everything in the 3 sections.
A with line on top means everything but A.
B with a line means everything but B.
A includes the middle section and A section.
B includes the middle section and B section.
A upside down U B, with a line on top means everything but the intersection.
A U B with a line on top of everything means just the number in the bottom left corner.
A U B line on top of B means everything but the B.
A U B with a line on top of everything means just the number in the bottom left corner.
A U B line on top of B means everything but the B.
A upside down U B line on top of B means just A.
A upside down U B line of top of A means just B.
A U B line on top of A means everything but B.
Example:
From a survey of a 100 college students, 75 students owned stereos, 45 owned cars, and 35 owned stereos and cars.
Example:
From a survey of a 100 college students, 75 students owned stereos, 45 owned cars, and 35 owned stereos and cars.
How many students owned neither?
To find the answer, you have to subtract the total amount of students (100), from the number of students with a car,or a stereo (85). The answer is, 15 own neither.
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