As the PTE requirement depends upon the purpose of taking the exam, there is no average PTE score as such.
The overall score in PTE Academic is a combination of the scores achieved in all the 4 individual skills, and not the average of the scores.
As per the Common European Framework of Reference for Languages (CEF), the PTE score ranges as per proficiency levels are:
CEF Level | Proficiency Level | PTE Academic score range |
A2 | Basic User | 24 to 42 |
B1 | Independent User | 36 to 58 |
B2 | Independent User | 51 to 75 |
C1 | Proficient User | 67 to 84 |
C2 | Proficient User | 80+ |
The CEF is used as a benchmark for reference to understand scores in any language qualification exam.