 
<translate> Tambaya: Wani mai sayar da littattafai yana sayar da littattafai 15 a watan Janairu, 16 a watan Fabrairu da kuma wasu littattafai a watan Maris. Idan matsakaicin adadin litattafan da ya sayar a kowane wata a cikin watanni uku duka 16 ne, litattafai nawa ya sayar a watan Maris? A: 17 <eng> Q:A bookseller sells 15 books in January, 16 in February and a certain number of books in March. If the average number of books he sold per month across all three months is 16, how many books did he sell in March?
A:17 