 
<translate> Ebe ọ bụ na ọnụahịa nke pensụl = 2 <unk> Ọnụ ego pensụl 75 = 150 <unk> Ọnụ ego mkpịsị 30 = (510 <unk> 150) = 360 <unk> Ọnụ ego nke otu mkpịsị akwụkwọ = 360⁄60 = 12 Azịza ya: (C). <eng> Since average price of a pencil = 2
∴ Price of 75 pencils = 150
∴ Price of 30 pens = (510 – 150) = 360
∴ Average price of a pen = 360⁄60 = 12 The answer: (C). 