Problema Solution
300 families surveyed showed that:
115 had dogs
88 had cats
40 had dogs and cats
112 had neither a dog a cat nor a parrot
10 had a cat and a dog and a parrot
How many had a parrot only?
Answer provided by our tutors
let
p = the number of families that had parrot only
solve using Venn diagram
115 + 88 - (40 + 10) + p + 112 = 300
p = 35 families had a parrot only
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