hard · GRE Quant

In a language-acquisition study, a 4-person review committee is selected from 12 distinct researchers. One particular researcher must be on the committee; the other three seats are filled from the remaining researchers. All members have the same role. How many different committees are possible?

  1. 165
  2. 220
  3. 495
  4. 1320
  5. 55

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