51.
What is the average age of children in the class?
I.
The age of the teacher is as many years as the number of children.
II. Average age is increased by 1 year if the
teacher's age is also included.
A. I alone sufficient while II alone not
sufficient to answer
B. II alone sufficient while I alone not
sufficient to answer
C. Either I or II alone sufficient to
answer
D. Both I and II are not sufficient to
answer
E. Both I and II are necessary to answer
52. The avearage age of boys in a class is 16
years and that of the girls is 15 years. The average age for the whole class is
A. 15
years B. 15.5 years
C. 16
years D. Cannot be computed
53. In the first 10 overs of a cricket game,
the run rate was only 3.2. What should be the run rate in the remaining 40
0vers to reach the target of 282 runs?
A.
6.25 B. 6.5 C. 6.75 D. 7
54. The average weight of a class of 24
students is 35 kg. If the weight of the teacher be included, the average rises
by 400 g. The weight of the teacher is
A. 45
kg B. 50 kg C. 53 kg D. 55 kg
55.
How many marks did Tarun secure in English?
I.
The average mark obtained by Tarun in four subjects including English is 60.
II. The total marks obtained by him in English
and Mathematics together are 170.
III. The total marks obtained by him in
Mathematics and Science together are 180.
A. I and II only B. II and III
only
C. I and III only D. All I, II
and III
E. None of these
56. Distanc e between two stations A and B is
778 km. A train covers the journey from A to B at 84 km per hour and returns
back to A with a uniform speed of 56km per hour. Find the average speed of the
train during the whole journey?
A. 67.0
km /hr B. 67.2 km /hr
C.
69.0 km /hr D. 69.2 km /hr
57. The age of five numbers is 27. If one
number is excluded, the average becomes 25. The excluded number is
A. 25 B. 27 C. 30 D. 35
58. Three years ago, the average age of A and
B was 18 years. With C joining them, the average age becomes 22 years. How old
is C now?
A. 20 years B. 24 years C. 27 years D. 30 years
59. After replacing an old member by a new
member, it was found that the average age of five numbers of a club is the same
as it was 3 years ago. What is the difference between the ages of the replaced
and the new member?
A. 2 years B. 4 years C. 8 years D. 15 years
60. The average weight of 8 persons increases
by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What
might be the weight of the new person?
A. 76
kg B. 76.5 kg C. 85 kg D. 90 kg
