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SMO 2016 Junior Round 1 Question 2

SMO · SMO 2016 Junior Round 1

Question 2

Given three integers, we form another three integers by adding the mean of any two of them to the third. If the three new integers formed are 33, 35 and 40, find the mean of the original three integers.
  1. $18$
  2. $27$
  3. $30$
  4. $36$
  5. None of the above