Answer: Marry drank less than half of her glass of juice.
Step-by-step explanation: Given that Larry, Mary and Terry each had a full glass of juice.Larry drank of his. Mary drank of hers and Terry drank of his.
We are to find who drank less than of their juice.
We have
Portion of the glass of juice that Larry drank
Portion of the glass of juice that Mary drank
Portion of the glass of juice that Terry drank
Therefore, Marry drank less than half of her glass of juice.