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

{red, orange, yellow, green, blue, indigo, violet}
{red, orange, yellow}
{all colors except red, orange, yellow }
{ }

Question

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

anonymous · Answer

Second one?

akashdeepdeb · Answer

No.

Example:

M = {A,B,C,D}
N = {D, %, ^, &}

M $\cup$ N = {A,B,C,D,%,^,&}
M $\cap$ N = {D}

Try now? :)

anonymous · Answer

The 3rd choice?

akashdeepdeb · Answer

No.

As I said, union includes all of the elements of BOTH sets. 
So it is the first choice, as it includes all elements of of both the sets. 

If you had to find A intersection B, then the second choice was correct, because it included ONLY the common elements from both sets A and B.