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The two possible measurements given by the student are :

  • 19 cm or 21 cm

Given the Parameters :

  • Length of stick = 20 centimeters
  • Percentage Error in measurement = 5%

The length of the error in measurement can be calculated thus :

  • Percentage error in measurement × length of stick
  • 20 cm × 5% = 1 cm

Therefore the student's measurement can be expressed as :

  • Actual measurement ± actual length
  • 20 - 1 or 20 + 1
  • 19 or 20

Therefore, the possible measurements of the student are 19 or 21 cm

Learn more : https://brainly.com/question/18796573

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