1.  The average weight of 25 students, of section A is 52 pounds and of section B is 55 pounds. Find the average weight of all the students of both classes. 
a.   53.00 pounds 
b.   53.25 pounds 
c.   53.50 pounds 
d.   53.30 pounds




2.  Find the average of squares, of the natural numbers, from 1 to 31. 
a.   335 
b.   336 
c.   320 
d.   378




3.  Find the average of cubes, of natural numbers from 1 to 15. 
a.   1000 
b.   890 
c.   960 
d.   540




4.  The production of a company for three successive years has increased by 10%, 30% and 90%, respectively. What is the average annual increase of production? 
a.   30% 
b.   35% 
c.   20% 
d.   25%




5.  A man covers 2/3rd of the distance at 8 mile/hr, the next 1/5th distance at 5 mile/hr and the remaining distance at 10 mile/hr. Find the average speed during the entire journey. 
a.   300/41mile/hr. 
b.   537/41mile/hr. 
c.   107/7mile/hr. 
d.   176/25mile/hr.




6.  Find the average of first 30 natural numbers. 
a.   10.5 
b.   15.5 
c.   13.5 
d.   13




7.  Find the average of first 50 natural numbers. 
a.   25.5 
b.   25 
c.   20 
d.   20.3




8.  The average of 5 consecutive numbers is 20. Find the largest of these numbers. 
a.   23 
b.   18 
c.   22 
d.   52




9.  The average of 7 consecutive odd numbers is 67. Find the largest of these numbers. 
a.   14 
b.   22 
c.   35 
d.   73




10.  The average of 5 consecutive numbers is 12. Find the lowest of these numbers. 
a.   10 
b.   19 
c.   41 
d.   61




11.  The average age of 45 students in a class is 20 years. The average age of 27 students is 18. What is the average age of the remaining 18 students? 
a.   27 
b.   45 
c.   23 
d.   80




12.  The average of 45 numbers is 30. If three numbers, 10, 20 and 30 are discarded, then the average of the remaining numbers is nearly: 
a.   50 
b.   30.7 
c.   45 
d.   35.5



