Question

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

A {red, orange, black, grey}
B {red, orange, yellow, green, blue, indigo, violet, black, grey}
C { }
D {red, orange}

Answer 1

I meant: A U B

Answer 2

Another set question...

A U B= Union of A and B. Meaning its like a simple addition.

So A U B = {red, orange, yellow, green, blue, indigo, violet, black, grey}