Ratios & Overlapping Sets

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6 Terms

1
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#(A or B)

#A + #B - #(A and B)

2
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Total # in 3 Overlapping Sets

Total # of Unique = #(A Only) + #(B Only) + #(C Only) + #(A&B Only) + #(A&C Only) + #(B&C Only) + #(A&B&C Only) + #(None)

3
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Total # in 3 Overlapping Sets if Using Sum of Exactly 2 Groups

Total # of Unique = #(Group A) + #(Group B) + #(Group C) - #(Exactly Two Groups) - 2(# Exactly three groups) + #(Neither groups)

4
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Direct Variation: If y varies with x…

y = kx where k is a constant

5
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Inverse Variation: if y varies inversely with x…

y = k/x where k is a constant

6
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Joint Variation: If y varies directly with x and inversely with z…

y = xk/z where k is a constant