Q: What is the union of Set A = {2,4,5,8,9} and Set B = {4,5,6,7,9}?
UNANSWERED.
The correct answer is D.
A: {2,4,5,6,7,8,9} is the answer.
To find the union of 2 sets, list all the elements from either set. So to get the union, we first include all the elements from Set A: 2,4,5,8,9.
Then we add in the elements from Set B = {4,5,6,7,9} one at a time: The 4 and 5 are already in the union, so we don't need to list them twice. Add in the 6: union = 2,4,5,6,8,9 Add in the 7: union = 2,4,5,6,7,8,9 The 9 is already in the union, so we don't need to list it twice. We finished adding all the elements from Set B to Set A, so we're done. We have the union of Set A and Set B.
