The mean age of two people in a room is 20 years.  A 50 year old person enters the room. What is the mean age of the 3 people in the room now 20 30 33.3 35 none of the above

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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The mean age of two people in a room is 20 years.  A 50 year old person enters the room. What is the mean age of the 3 people in the room now

  1. 20
  2. 30
  3. 33.3
  4. 35
  5. none of the above
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