Which of the following sets equals ∅?
{all whole numbers}
{all letters in the alphabet}
{all fish with feathers}
{all flowering plants}
{Karen, John, Sue} ∩ {John, Perry, Kay} =
∅
{John}
{Karen, Sue, Perry, Kay}
{Karen, John, Sue, Perry, Kay}
{1, 3, 5, 7, 9} ∩ {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} =
{3}
{1, 3}
{1, 3, 5, 7, 9}
{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
{vowels} ∩ {letters of the alphabet} =
a, e, i, o, u
all letters of the alphabet
a, e, i, o, u, y
all consonants
{5, 10, 15, 20, 25} ∪ {10, 20, 30, 40} =
{5, 10, 15, 20, 25, 30, 40}
{10, 20}
{5, 15, 25}
{10, 20, 30, 40}
