Question

calculati media aritmetica a 3 numere stiind ca 2 cate 2 au media aritmetica 11 36 32

Answer 1

(a+b)/2=11⇒  a+b=11·2    ⇒a+b=22
(b+c)/2=36⇒  b+c=36·2   ⇒ b+c=72⇒  b=72-c
(a+c)/2=32⇒  a+c=32·2    ⇒ a+c=64⇒  a=64-c

inlocuim in a+b=22 ⇒  64-c+72-c=22
136-2c=22
-2c=22-136
-2c=-114    inmultim -1
2c=114
c=114/2
c=57
a=64-c=64-57=7
a=7
b=72-c=72-57=15
Ma=(a+b+c)/3=(7+15+57)/3=79/3=26,(3)