 
 <translate> (Grade 1 + Grade 2) - (Grade 2 + Grade 5) = 30
Grade 1 - Grade 5 = 30
The final answer: (B). <hau> (Grade 1 + Grade 2) - (Grade 2 + Grade 5) = 30 Matsayi na 1 - Matsayi na 5 = 30 Amsar ƙarshe: (B). 