Mathematics, 30.12.2021 01:40 gyexisromero10

$A$, $B$ and $C$ are circular regions as shown. There are 7 items in circle $C$. There are exactly 20 items in $A$ and 10 of those items are not in $B$. How many items are in $B$, but not in $C$?

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$A$, $B$ and $C$ are circular regions as shown. There are 7 items in circle $C$. There are exactly 2...