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media aritmetica a lui 2,4(6) si 3,4(66) si 5,(55)

Răspuns :

[tex] \frac{246-24}{90}= \frac{222}{90}= \frac{37}{15} 
\frac{3466-34}{990}= \frac{3432}{990}= \frac{572}{165}
 [tex] \frac{55-5}{9}= \frac{50}{9} [/tex]
 [tex] \frac{1221+1716+2750}{495}= \frac{5687}{495}= \frac{517}{45} [/tex]
 [tex] \frac{517}{45}: \frac{2}{1}= \frac{517}{45}* \frac{1}{2}= \frac{517}{90}=5.7(4) [/tex]