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AMO 2023 – Secondary 2 (Grade 8) Question 2

AMO · AMO 2023 – Secondary 2 (Grade 8)

Question 2

Two real numbers $X,Y$ are randomly chosen with $0<X<5$ and $2<Y<7$. What is the probability that $3<X+Y<8$? Interpret the choices as independent and uniform over these intervals.

Question illustration

Supplementary diagram of the given data:
Question illustration
  1. 60%
  2. 66%
  3. 68%
  4. 72%