Question

1.Calculati media aritmetica a numerelor:
a)12 si 18
b)204 si 305
c)7 si 8,4
d)9 si 14,32
e) 10,5 si 47,34
f)10;12 si 30,2



Va rog

Answer 1

Răspuns:

$\bf a) \: \: M_a = \frac{12 + 18}{2} \\ \\ \bf M_a = \frac{30}{2} \Rightarrow \red{\boxed{\bf M_a = 15}}$

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$\bf b) \: \: M_a = \frac{204 + 305}{2} \\ \\ \bf M_a = \frac{509}{2} \Rightarrow \blue{\boxed{\bf M_a = 254.5}}$

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$\bf c) \: \: M_a = \frac{7 + 8.4}{2} \\ \\ \bf M_a = \frac{15.4}{2} \Rightarrow \green{\boxed{\bf M_a = 7.7}}$

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$\bf d) \: \: M_a = \frac{9 + 14.32}{2} \\ \\ \bf M_a = \frac{23.32}{2} \Rightarrow \orange{\boxed{\bf M_a = 11.66}}$

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$\bf e) \: \: M_a = \frac{10.5 + 47.34}{2} \\ \\ \bf M_a = \frac{57.84}{2} \Rightarrow \pink{\boxed{\bf M_a = 28.92 }}$

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$\bf f) \: \: M_a = \frac{10 + 12 + 30.2}{3} \\ \\ \bf M_a = \frac{22 + 30.2}{3} \\ \\ \bf M_a = \frac{52.2}{3} \Rightarrow \purple{\boxed{\bf M_a = 17.4 }}$