Question 3
A closed box contains 3 red, 5 yellow and 7 white balls. Without looking, what is the smallest number of balls that must be drawn to guarantee at least THREE balls of one colour?
Original printed choices: A) 2; B) 3; C) 4; D) 5; E) 6
Editorial task: Explain the literal model, the source method and any necessary correction.
Original printed choices: A) 2; B) 3; C) 4; D) 5; E) 6
Editorial task: Explain the literal model, the source method and any necessary correction.