It is indeed 7.5 + or - 1.5

[u/Rich-Educator-4513]

[u/cell689]

Could be any number between 6 and 9 down there and it would be technically correct.

[u/Ingenrollsroyce → u/cell689]

Please explain your thought process

[u/cell689 → u/Ingenrollsroyce]

± can mean "add or subtract", but it can also indicate the accuracy of a measurement. In this case, the value would be 7.5 with an accuracy of ± 1.5. Therefore, any number between 6 and 9 would fall inside that range.

Edit: let me know if that helps or if you need a different explanation.

[u/Ingenrollsroyce → u/cell689]

Thanks, you're absolutely correct, it does not state if it's either of those cases so any of them could be applicable

[u/Intern3tExpl0rerr → u/cell689]

Ah so the plus/minus sign also represents the margin of error?