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AMC10 2027 - Self-practice Set 4 Question 3

AMC10 · AMC10 2027 - Self-practice Set 4

Question 3

Tina uniformly chooses two distinct numbers from $\{1,2,3,4,5\}$. Independently, Sergio uniformly chooses a number from $\{1,2,\ldots,10\}$. What is the probability that Sergio's number exceeds the sum of Tina's numbers?
  1. $\frac25$
  2. $\frac9{20}$
  3. $\frac12$
  4. $\frac{11}{20}$
  5. $\frac{24}{25}$