Question

Calculati media aritmetica a nr
A) 0,(3) 1/5 0,7 1 si 1/2

Answer 1

$\frac{0.(3) + \frac{1}{5} + 0.7 + 1 + \frac{1}{2} }{5} = \frac{ \frac{3}{9} + \frac{1}{5} + \frac{7}{10} + 1 + \frac{1}{2} }{5}$

$= \frac{ \frac{1}{3} + \frac{1}{5} + \frac{7}{10} + 1 + \frac{1}{2} }{5} = \frac{ \frac{10}{30} + \frac{6}{30} + \frac{21}{30} + \frac{30}{30} + \frac{15}{30} }{5}$

$= \frac{ \frac{10 + 6 + 21 + 30 + 15}{30} }{5} = \frac{ \frac{82}{30} }{5} = \frac{82}{30} \times \frac{1}{5}$

$= \frac{82 \times 1}{30 \times 5} = \frac{82}{150} = \frac{41}{75}$