Vamos là.
soma
S = 10 + x + 12 + 16 + 18 = x + 56
n = 5
media
m = S/n = 12
S = 60
x + 56 = 60
x = 4
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Vamos là.
soma
S = 10 + x + 12 + 16 + 18 = x + 56
n = 5
media
m = S/n = 12
S = 60
x + 56 = 60
x = 4
M = 12
(10+x+12+16+18)/5= 12
(x+22+34)=5.12
x+56= 60
x = 60-56
x = 4