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}

{ }

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}

 { }

cedric · Answer

What are you having problems with?

cedric · Answer

Well to make this simple for you, when you see the intersect symbol, you basicaly just want every number thats inside the larger set

cedric · Answer

So in your case the answer is B

anonymous · Answer

just wanted to make sure my answer was right.... i thought it was C. 
but i understand what i did wronggg