Răspuns: [tex]\bf \dfrac{61}{24}[/tex]
Explicație pas cu pas:
Salutare !
[tex]\boxed{\bf Media\:\:aritmetica = \dfrac{a + b}{2} }[/tex]
[tex]\bf Ma = \dfrac{3+\dfrac{25}{12} }{2}= \dfrac{\dfrac{3\cdot12 +25}{12} }{2}=\dfrac{\dfrac{61}{12} }{2}=\dfrac{61}{12}:\dfrac{2}{1}=\dfrac{61}{12}\cdot\dfrac{1}{2}=\boxed{\bf \dfrac{61}{24}}[/tex]
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