Media aritmetică: 2exerciți
Repede!


1.) ma= 29
ma= (21+14,4+34,6+x)/4
29= (21+14,4+34,6+x)/4
21+14,4+34,6+x= 4•29
21+14,4+34,6+x= 116
70+x= 116
x= 116-70
x= 46
2.) ma= 14,75
ma= (8,4+b)/2
14,75= (8,4+b)/2
8,4+b= 2•14,75
8,4+b= 29,5
b= 29,5-8,4
b= 21,1