What grade will come out for the quarter if if the grades are 4, 4, 3, 4, 4, 5?

Answer from: Ilya Ponomarev:
Director of a tea company "Samovartime"...

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It's easy to add up all the numbers and at the end divide by the number how many grades you get
If you have 4 4 3 4 5 it's 24 and divided by 6 it's 4