Help for suitable function

I want to predict second test result based on first test result. But the test itself is non-identical.
My first test result is consist of 30 data points (questions) of three categories {E,N,H} and I have the scores for each individuals (35 person).
Now I have the second test, 30 data points (questions) with same three categories. But the ratio of E:N:H is different. And I would like to predict each individual score. Is it possible?

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