A survey of 250 collectors showed the following results: 108 collected baseball cards, 92 collected comic books, 62 collected stamps, 29 collected baseball cards and comic books, 5 collected baseball cards and stamps, 2 collected comic books and stamps, 2 collected all three. How many collectors did not collect any of these? A:30 B:32 C:22 D:0

Question

A survey of 250 collectors showed the following results: 108 collected baseball cards, 92 collected comic books, 62 collected stamps, 29 collected baseball cards and comic books, 5 collected baseball cards and stamps, 2 collected comic books and stamps, 2 collected all three.    How many collectors did not collect any of these? A:30 B:32 C:22 D:0

anonymous · Answer

use venn diagram

amistre64 · Answer

yeah, and it might be good to work from the middle out

amistre64 · Answer

there is a set version of it too like:  P(AuB) = P(A)+P(B)-P(AnB)

amistre64 · Answer

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