Admission test for the degree course in medicine and surgery 2011-2012
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?