If you place a probe in the aorta what chamber will it exit

Through the Left ventricle

Explanation:

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Anatomically, the left ventricle empty directly into the aorta.  Therefore the probe will pass through the aortic valve to exist in left ventricle.

The left ventricle pumps oxygenated blood out of the heart through the aorta into the systemic circulation. Consequently, there must be a closed link between the chamber which stores and empty the blood (left Ventricle), and the vessel which conveys blood to the target areas (Aorta) in the systemic circulation.

check the attachments for clearer picture of this.

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he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.

this is math not biology xd