Hello!
Why
FullForm[Apply[Plus, {4.2, 5, 3, 4.1, 4.4, 4.2}]/6]
returns 4.1499999999999995` and not 4.15?
This generates a problem when we want to round the result :
Round[Apply[Plus, {4.2, 5, 3, 4.1, 4.4, 4.2}]/6, 0.1]
returns 4.1 instead of 4.2.
I met this problem when I've done this calculation :
Round[Mean[{4.2, 5, 3, 4.1, 4.4, 4.2}], 0.1]
Thank you for your help.
Jérôme