In a class, the average age of 42 boys is 12 years…

In a class, the average age of 42 boys is 12 years and the average of 28 girls is 10 years. what is the average age of the whole class?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #57305