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Mathematics 19 Online
OpenStudy (anonymous):

Records at a small college show the following about the enrollments of 100 first year students in mathematics, fine arts, and economics: 38 take math, 15 take math and economics, 42 take fine arts, 9 take math and fine arts, 20 take economics, 12 take math and economics but not fine arts and 4 take economics and fine arts Draw a venn diagram that represents this information Any Help!? :C

OpenStudy (fibonaccichick666):

so first, what is a venn diagram?

OpenStudy (fibonaccichick666):

can you draw an example?

OpenStudy (anonymous):

|dw:1398919133539:dw|

OpenStudy (anonymous):

Is something like this!

OpenStudy (fibonaccichick666):

now what does each little intersection represent?

OpenStudy (fibonaccichick666):

and what does the one in the center represent?

OpenStudy (anonymous):

|dw:1398919189437:dw|

OpenStudy (anonymous):

I did this one, but it is wrong, but it supposed to be like that

OpenStudy (fibonaccichick666):

first check, does that add to 100?

OpenStudy (fibonaccichick666):

second, there are no econ majors?

OpenStudy (fibonaccichick666):

also how many pure math majors are there?

OpenStudy (anonymous):

I think it is hard to understand if you don't know about Venn diagrams D':

OpenStudy (anonymous):

the chapter is Sets and counting

OpenStudy (fibonaccichick666):

not really

OpenStudy (fibonaccichick666):

i mean you showed me a picture

OpenStudy (fibonaccichick666):

but let's do a simple one to explain

OpenStudy (fibonaccichick666):

|dw:1398919547921:dw|

OpenStudy (fibonaccichick666):

Do you see what the intersection means? Can you explain in your own words?

OpenStudy (anonymous):

The intersection means that the people in the middle have both, a dog and a cat

OpenStudy (anonymous):

A only have Dog and B only have Cat

OpenStudy (fibonaccichick666):

good, so now with three:|dw:1398919695096:dw|

OpenStudy (fibonaccichick666):

let's say c is snake

OpenStudy (fibonaccichick666):

same A and b

OpenStudy (anonymous):

Then A, B, and C have a snake

OpenStudy (fibonaccichick666):

no,

OpenStudy (fibonaccichick666):

that center is the intersection of all three circles

OpenStudy (fibonaccichick666):

if with two circles the intersection meant they have both a dog and a cat. The intersection of the three means the have ________.

OpenStudy (anonymous):

snake dog and a cat

OpenStudy (fibonaccichick666):

ok so now, |dw:1398920059096:dw|

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