The average age of a committee of 12 members is 40 years

The average age of a committee of 12 members is 40 years. A member aged 55 years retired and his place was taken by another member aged 39 years . The average age of present committee is;

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #10963