Question

If C = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} and D = {numbers divisible by 3 from 1 to 21}, what is C ∩ D?

{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 18, 21}

{3, 6, 9, 12, 15, 18, 21}

{3, 6, 9}

{ }

Answer 1

D={3,6,9,12,15,18,21}
Nw C ∩ D is the set containing elements common to both C and D. can u find nw?

Answer 2

it must be C

Answer 3

because both 'c'||'D' all have{3,6,9}