Question

If A = {red, orange, yellow} and B = {red, orange, yellow, green, blue, indigo, violet}, what is A B?

{red, orange, yellow, green, blue, indigo, violet}

{red, orange, yellow}

{all colors except red, orange, yellow }

{ }

Answer 1

What are the common colors?

Answer 2

\[
A \cap B=\{red, orange, yellow\}
\]