The phrase "and probably a third" is correct and usable in written English.
It can be used when estimating or suggesting an additional item or quantity that is uncertain or not precisely known.
Example: "We have two options on the table, and probably a third that we haven't considered yet."
Alternatives: "and possibly a third" or "and maybe a third".
It will become hard for the Republicans to avoid a costly and distracting primary in September between Mr Golisano, Mr Weld and probably a third candidate, John Faso, a lawyer from Long Island who appeals to the right.New York is hostile terrain for Republicans at the best of times.
Jack and I had written a case about one of my clients at Morgan Stanley, and the students would read the case carefully and ask questions — some of them had really smart questions around finance, some of them had really smart questions about technology, and probably a third of the class would have no idea what we were talking about and would ask questions that were ill-informed.
Avempace wrote a treatise on animals related to the Aristotelian books Generation of Animals, Parts of the animals and Description of animals, and another one on plants (Asín Palacios 1940) and probably a third one on minerals, all following the Pseudo-Aristotelian corpus.[24] The Book of Animals was edited by Jawâd al-‛Imâratî (Ibn Bâjja 2002a).
He will win his second Oscar for this work, and probably a third when he finds another 'important' subject to hide behind.
2, 3, 7 The former approach was tested with omapatrilat, but blockade of both NEP and ACE (and probably a third enzyme, aminopeptidase P) resulted in an unacceptable risk of angioedema because each of these enzymes is also involved in the breakdown of bradykinin.
That night in 1998, Lawrence, Garner, Eubanks, and probably a fourth man were all in Lawrence's apartment.
Last year more than 200,000 hikers crowded into the Adirondack High Peaks area near Lake Placid, and probably a fifth of them attempted Mount Marcy, according to recent state statistics.
"The economy has reduced our income, which is why we are selling them and probably a fourth horse," Ms. Mazzarisi said.
"I shall sit out my term as an independent and give my wholehearted support to Jane Collins who is almost certainly going to be the next Ukip MEP and probably a second seat yet to be decided.
Leicester are cantering to a home semi-final and probably a ninth consecutive Twickenham final after a forgettable five-try beating of an underpowered Wasps side who looked to have their minds elsewhere.
Touch, smell, sight, hearing, taste - and probably a sixth too.
