On checking with 100 investors to see who owned electric company stock (E), tran

Question

On checking with 100 investors to see who owned electric company stock (E), transportation stock (T), or municipal bonds (M), the numbers shown in the diagram below were found. (a) How many investors owned electric company or transportation stock but not both? investors (b) How many owned electric company or transportation stock but not municipal bonds? investors (c) How many had one or two of these types of investments but not all three? investors (d) How many had at least two of these types of investments? investors (e) How many had none of these types of investments? investors

Explanation / Answer

A) number of investors owned electric company or transportation sock but not both = 26 + 19 + 8 + 11 = 64

B) number of investors = 26 + 6 + 11 = 43

C) number of investors = 26 + 6 + 11 + 19 + 8 + 10 = 80

D) number of investors = 6 + 19 + 8 + 2 = 35

E) number of investors = 100 - 80 - 2 = 18

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