TOEFL Grammar - Find the error

ScottsEnglishScottsEnglish Administrator Posts: 1,296 admin ✭✭✭✭✭✭✭
edited May 2016 in TOEFL Test

Find the error in the following sentence:


About one out of every 7 people, that is, 1 billions people, use social media.
              A                                B                          C                         D

About one out of every 7 people, that is, 1 billion people, use social media.


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