#### Answer

31

#### Work Step by Step

To solve this question, find the number of people that solely use their phone for taking pictures. This value will be the number of people who do both subtracted from the number of people that only use their phone to take pictures, this will equal 14. Now that you know the number of people that only use their phone to take pictures and the number of people who use their phone to both take pictures and play games you can determine the number of people that only use their phone to play games by subtracting 14 and 35 from 80. You will end up with 31, which is your answer.