conversations.from: human
conversations.value: If John scored 100 on his first 3 tests and an 80 on his 4th, what was his average score across the 4 tests?
  Give me a clear explanation.
conversations.from: assistant
conversations.value: 100+100+100+80=380 total score across 4 tests
  380 total score / 4 tests = 95 average score