AQuA-RAT dev #66 · Arithmetic · Averages
The average age of the first seven people to arrive at Nikhil’s…
The average age of the first seven people to arrive at Nikhil’s birthday is 21. When Vijay (29) arrived, the mean age is increased to 22. Marry (also 29) arrived next. The tenth and last person to arrive at Nikhil's party is Nikhil himself, and the mean age increased to 30 years. How old is Nikhil on his birthday?
AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · dev #66
Stuck? A gentle nudge
No hints for this one.
Your answer
Checked against the answer in AQuA-RAT.