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Calculati media ponderata a numerelor:
a)1 supra 3; 1 supra 6;1 supra 8 cu ponderile 2,3 si 4
b)0,5 ; 1,12 ; 3,2 ;4 cu ponderile 3,4,5, si 8

Răspuns :

Andreybossuask
a) 1/3*2=1/6
1/6*3=1/18
1/8*4=1/32
1/6+1/18+1/32=4/18+1/32=9/32
1/3+1/6+1/8=3/6+1/8=16/24=2/3
(9/32)/(2/3)=(9/32)*(3/2)=18/96=9/48=3/16
b) 0,5*3=1,5
1,12*4=4,48
3,2*5=16
4*8=32
1,5+4,48+16+32=53,98
0,5+1,12+3,2+4=8,82
53,98/8,82=6.12

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