Question

You survey 200 people about the electronics they own. The results show that 33/40 people own a cell phone. Of these people, 10/11 also own an MP3 player. what fraction of the people own a cell phone and an MP3 player? How many people own a cell phone, but not an MP3 player? Explain.

Answer 1

200 * 33/40 = 165 owns phones
165 * 10/11 = 150 owns phones and MP3 player

Therefore 3/4 owns both and
165 owns only phones