Test ministeriali 2011-2012 in lingua inglese per l’accesso alla facoltà di Medicina e Chirurgia 2012-2013
Domanda 76 di 80
David has two boxes containing shapes. In box A there are 4 stars and 2 hearts. In box B there are 2 stars and 1 heart. David takes, at random, a shape from box A and puts it into box B. He then takes a shape from box B. What is the probability that this shape is a star?