Three dots was therefore for me too and I'm not medical....
as said above you need 2 formulae for 2 unknowns.....
as said above you need 2 formulae for 2 unknowns.....



I read the question wrongly,I was assuming that "The grades go from 8 to 19. " was the total grade rather than the grade for each section

Would use the three dots if I was writing by hand though, standard abbreviation in all fields to my knowledge and something I use / see most days.





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