1) The average age of 40 boys of a class is 12 years . When 10 new boys are admitted, the average is increased by 0.1 year. What is average age of new boys?

(a) 12.4 yrs

(b) 12.33 yrs

(c ) 12.5 yrs

(d) 13 yrs.

c

2) The average of 7 numbers is 25 , that of first two is 23 and of the last two is 19. If the 3rd , 4th and 5th numbers bear a ratio of 1/4 ∶ 1/2 : 1 to one another, what is 4th number?

(a)13

(b)25

(c)26

(d)50

c

3) The average age of A & B is 20 years .If C were to replace A , the average would be 19 and if C were to replace B, the average would be 21. What are the ages of A , B and C?

(a) 18 , 20 , 22

(b)18 , 22 , 20

(c)22 , 20 , 18

(d) 22 , 18 , 20

d

4) The average weight of 5 men is 70kg. If average weight of 2 of them is 73kg, what is average weight of other 3 men?

(a)65 kg

(b)66.6 kg

(c )68 kg

(d)None

c

5) A class has two sections in one of which there are 40 students with an average of 14.5 years. The average of the class is 14.2 years. If there be 32 students in the other section , its average age is:

(a)13.5 yrs

(b)13.6 yrs

(c )13.7 yrs

(d)None

d

6) Five years ago, average age of P & Q was 15 years. Average age of P , Q & R today is 20 years. How old will R be after 10 years?

(a)35 yrs

(b)40 yrs

(c)30 yrs

(d)50 yrs

c

7) The average of 5 numbers is 20 and 4 of numbers are 10 , 15 , 20 and 25 ,what is the average of three largest numbers?

(a)18.75

(b)19.60

(c)20

(d)25

d

8) Mukesh has twice as much money as Sohan and Sohan has 50% more money than what Pankaj has. If the average money with them is Rs 110. Then Mukesh has

(a)Rs 55

(b)Rs 60

(c )Rs 90

(d)Rs 180

d

9) The average age of 30 students of class is 12 years. The average age of group of 5 students is 10 years and that of another group of 5 of them is 14 years. What is the average of the remaining students?

(a) 8 years

(b) 10 yrs

(c )12 yrs

(d)14 yrs

c

10) A batsman has a certain average of runs for 12 innings. In the 13th innings he score 96 runs thereby increasing his average by 5 runs. What is his average after the 13 innings?

(a)32

(b)36

(c )38

(d)40

(e)42

a