Question

media aritmetica a 3 nr este 12 iar media primelor doua nr este 10 calculati al 3 lea nr

Answer 1

(A+B+c):3=12 /a+B+c=36/ (a+B ):2=10 A+B=20 / 20+c=36 /c=16

Answer 2

(a+b+c):3=12⇒a+b+c=36
(a+b):2=10⇒a+b=20
a+b+c=36
20+c=36
c=36-20
c=16