Calculer la moyenne pondérée d'une série de données donnée en classe représentée dans un tableau Exercice

m\approx \frac{{11 \times 5+13 \times 8+15 \times 7 + 17 \times 8}}{28}

m\approx \frac{{10\times 5+12 \times 8+14 \times 7 + 16 \times 8}}{28}

m\approx \frac{{11+13+15+17}}{4}

m\approx \frac{{5+8+7+8}}{4}

m\approx \frac{{152{,}5 \times 3+160 \times 4+168{,}5 \times 7 + 174 \times 6+178 \times 4}}{24}

m\approx \frac{{150 \times 3+155 \times 4+165 \times 7 + 172 \times 6+176 \times 4}}{24}

m\approx \frac{{152{,}5+160+168{,}5+174+178}}{5}

m\approx \frac{{3+4+7+6+4}}{5}

m\approx \frac{{2 \times 1+6 \times 5+9 \times 12 + 12 \times 14+15 \times 28+18\times20}}{80}

m\approx \frac{{0 \times 1+4 \times 5+98\times 12 + 120\times 14+14 \times 28+16\times20}}{80}

m\approx \frac{2 +6 +9 + 12 +15 +18}{6}

m\approx \frac{1+5+12+14+28+20}{6}

m\approx \frac{{7{,}5 \times 12+11 \times 6+14 \times 10 + 19 \times 15+26 \times8 }}{51}

m\approx \frac{{5 \times 12+10 \times 6+12 \times 10 + 16 \times 15+22 \times8 }}{51}

m\approx \frac{{7{,}5+11+14+19+26}}{5}

m\approx \frac{{12+6+10+15+8}}{5}

m\approx \frac{{35 \times 11+65 \times 15+90\times 22 + 110 \times 19 }}{67}

m\approx \frac{{20 \times 11+50 \times 15+80\times 22 + 100 \times 19 }}{67}

m\approx \frac{35+65+90+110}{4}

m\approx \frac{{11+15+22+19}}{4}