Jawapan

2016-06-14T20:29:37+08:00
[(12.5 kg - 2 kg) / 7] *1000

2016-06-14T20:31:18+08:00
12.5-  2 = 10.5kg (tukarkan kepada g)
             = 10.5kg x 1000
             = 10500g
Purata jisim bagi setiap betik
= 10500/7
= 1500g