Răspuns :
Ma=[tex] \frac{ a_{1}+ a_{2}+...+ a_{n} }{n} [/tex]
[tex] \frac{ \frac{120}{49} }{4}= \frac{120}{49}* \frac{1}{4}(simplcu 4)= \frac{30}{49}* \frac{1}{1} = \frac{30}{49} [/tex]
[tex] \frac{ \frac{120}{49} }{4}= \frac{120}{49}* \frac{1}{4}(simplcu 4)= \frac{30}{49}* \frac{1}{1} = \frac{30}{49} [/tex]