1
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In a class of 51 students, the difference between the highest mark and the least mark is 70. If the average score is calculated without considering the student who got the highest mark, then the average score decreases by 1%. If the average score is calculated without considering the student who got the least mark, then the average score increases by 1.33%. What is the original average score of the class?

- 60
- 70
- 80
- 40

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