A. 47.55 kg
B. 48 kg
C. 48.55 kg
D. 49 kg
Required average = [ (50.25 x 16) + (45.15 x 8) ] / ( 16 + 8 )
=> (804 + 361.20) / 24
=> 1165.20 / 24
=> 48.55
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
If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, then the average marks of all the students is:
A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half (1/2). The number of pupils in the class is: