Answer:
No. The "O" in blood typing should actually be viewed as a zero, meaning the absence of either A or B markers in the blood. So, a type O person has no A nor B markers in his or her blood. Because such a person has no A or B trait to pass on to a child, such a parent could not possibly have passed on a B trait to the child. And the parent with A positive blood has no B trait to pass on, either. Therefore the child from such a pairing cannot be AB positive, because neither parent has the B trait to pass on to the child.