There are 15 students in a class

There are 15 students in a class. On the day the test was given, Cara was absent. The other 14 students took the test and their average was 76. The next day, Cara took the test, and with this grade included, the new average was 77. What was Cara's grade on the test?

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #66041