 
 <translate> Reconstruct a question, answer pair from this explanation: He sold an average of 16 books per month across all 3 months so he must have sold a total of 3 * 16 = 48 books in those 3 months. He sold 15 + 16 = 31 in January and February. He must have sold 48 - 31 = 17 books in March.
 <hau> Sake gina tambaya, amsa ma'aurata daga wannan bayani: Ya sayar da matsakaicin littattafai 16 a kowane wata a cikin duka watanni 3 don haka dole ne ya sayar da jimlar littattafai 3 * 16 = 48 a cikin waɗannan watanni 3. Ya sayar da 15 + 16 = 31 a watan Janairu da Fabrairu. Dole ne ya sayar da littattafai 48 - 31 = 17 a watan Maris. 