Average - General Aptitude

Q1:

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

ANS:D - 285

Since the month begins with a Sunday, to there will be five Sundays in the month.

Required average
= 510 x 5 + 240 x 25
30
 
= 8550
30
  = 285