Question

Media aritmetica a numerelor a si b este 23.Media aritmetica a numerelor c si d este 33 .Determinati
a)suma nr a si b
b)media aritmetica a numerelor a,b,c si d

Answer 1

$\frac{a+b}{2} =23=\ \textgreater \ a+b=23*2=\ \textgreater \ a+b=46 \\ \frac{c+d}{2} =33=\ \textgreater \ c+d=33*2=66 \\ \frac{a+b+c+d}{4} = \frac{46+66}{4} =28$