1) A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is : A) 250 B) 276 C) 280 D) 285 Answer: Option DExplanation:Since the month begins with a sunday so there will be five sundays in the month .Required avearge = $\frac{510\times5+240\times25}{30}=\frac{8550}{30}=285$
