Ma = ( a + b + c ) / 3 = 25,48 → media aritmetica a trei numere ( a; b si c )
a + b + c = 25,48 × 3
a + b + c = 76,44 → suma celor trei numere
Ma ( a; b) = ( a + b ) / 2 = 23,32 → media aritmetica a primelor doua numere
a + b = 23,32 × 2
a + b = 46,64 → suma primelor doua numere
b = c - 3,66
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a + b + c = 76,44
a + b = 46,64
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76,44 - 46,64 = 29,80 ( c ) → al treilea numar
b = 29,80 - 3,66
b = 26,14 → al doilea numar
46,64 - 26,14 = 20,50 ( a ) → primul numar
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Verific:
( 20,50 + 26,14 + 29,80 ) : 3 = 76,44 : 3 = 25,48 → media aritmetica a celor trei numere
( 20,50 + 26,14 ) : 2 = 46,64 : 2 = 23,32 → media aritmetica a primelor doua numere
