Monique has three sons who play football, two sons who play baseball,
and one son who plays both sports. If all of her sons play baseball or
football, how many sons does she have?
(1) 5 (3) 3
(2) 6 (4) 4
One son plays both, so subtract 1 from both categories. You're left with 1 son who plays both, 2 sons who play only football, and 1 son who plays only baseball. She has 4) 4 sons.
