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SASMO 2020 Grade 9 Question 4

SASMO · SASMO 2020 Grade 9

Question 4

Find $\dfrac{2025(19!)^2-5(19!)^2}{100\times18!\times20!+18!\times20!}$.
  1. 19
  2. 2020
  3. 2025
  4. $2020\times19!$
  5. None of the above