Question

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

A { }
B {red, black}
C {all colors except red and black}
D {red, orange, yellow, green, blue, indigo, violet, black}

Answer 1

What is U?

Answer 2

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

Answer 3

Union, but nevermind I got it.