What is the range of ‘probable error of computed distance’ for the tertiary triangulation?

1
1 in 20,000 to 1 in 50,000.
2
1 in 60,000 to 1 in 250,000.
3
1 in 5,000 to 1 in 20,000.
4
1 in 1000 to 1 in 5000.

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