A company conducted a marketing survey for families with young children and found that 102 families own a Nintendo DS and 200 families own a Nintendo Wii. If 21 own a Wii and a DS, how many own either a Wii or DS, but not both?

Question

anonymous · Answer

soou would add 102 to 200 and then subtrat by 21 right?

anonymous · Answer

It's saying that's not right!

anonymous · Answer

Hmm I guess I don't know that seems like that would be how you would do it I don't know another way i'm sorry