Qual é a probabilidade de nascer uma criança receptora universal

doadora seria se ela fosse O pois poderia doar a todos mais para ser receptora ela tem que ser AB

this would be a math

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.