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2. 78 × 2 = 156
3. 84 × 4 = 336
4. 87 × 2 = 174
5. 89 × 1+ = 89 +
10 831
831 : 10 = 83,1 (d)
Tolong tandai sebagai jawaban terbaik ya ?
rata-rata=(76x1)+(78x2)+(84x4)+(87x2)+(89x1)/(1+2+4+2+1)
rata-rata=76+156+336+174+89/10
rata-rata=831/10
rata-rata=83,1 (d)