mohon dibantu ya teman teman

Rata2 gabungan = (n1 x rata-rata1 - n2 x rata-rata2) : n1-n2

100 = (10 x 105 - 1 x r2) : 9
900 = 1050 - r2
rata-rata 2 = 150 gram

berat jeruk = 150 gram

100 ; {10 x 105 - 1 x r2} : 9
900 ; 1050 - r2
rata-rata 2 = 150 gram
Jadi,berat buah jeruk = 150 gram
Semoga membantu^_^
Good Luck;)