TNPSC Group I ExamPrevious Year Question PaperSubject wise Analysed QuestionsMental AbilityPart 3
51. A shopkeeper marks his goods to gain 30%.
But he allows 10% discount for down cash payment. His profit per cent is
A) 20% B) 17%
C) 15% D) 13%
Answer : (B)
52. Function(s) of statistics is/are
A) collection of data
B) compilation and tabulation of data
C) analysis
of data
D) all of these
Answer : (D)
53. The total expenditure of family is
Rs.1,080 and they are spending Rs.450, for food, Then to draw a pie diagram the
degree value is
A) 1978  79 B) 1979  80
C) 1980  81 D) 1981  82
Answer : (C)
54. Find out the missing observation of the
following data with mean 5.
2,6,5,3,8,2,, 9, 7,7,6.4
A) 3 B) 2
C) 1 D) 0
Answer : (C)
55. Data which are not collected by the
organization for the specified, is known as
A) primary data
B) secondary data
C) categorical
data
D) quantitative data
Answer : (B)
56. Marks obtained by 7 students in Computer
Science are 5,40,60,90,80,65,55. The median value for the data is
A) 90 B) 60
C) 80 D) 55
Answer : (B)
57. Consider the following statements :
Assertion (A) : Classification is the basis for tabulation.
Reason (B) : First the data are classified and then
tabulated.
Now select your answer according to the
coding scheme given below:
A) Both (A) and (R) are true and (R) is the
correct explanation of (A)
B) Both (A) and (R) are true, but (R) is
not the correct explanation of (A)
C) (A) is
true, but (R) is false
D) (A) is false, but (R) is true
Answer : (A)
58. Given the following
Cause
of Accident :

Fire

Traffic

Falls

Burns

Falling
objects

Misc.

No.
Accidents :

10

15

20

15

35

5

The suitable diagram for the above data is
A) Bar diagram
B) Histogram
C) Piediagram
D) 13
Answer
: (C)
59. The table below gives the distribution of
the age if women at the
time of marriage :
Age group (in years)

No. of Women

15
 19

11

20
 24

36

25
 29

28

30
 34

13

35
 39

7

40
 44

3

44
 49

2

The given distribution is
A) not contribution
B) continuous
C) cumulative
distribution
D) smoothed distribution
Answer : (A)
60. Consider the following statements :
Assertion (A) : Diagrams can be used for comparison only
Reason (B) : Diagrams cannot study mathematical
relationship.
Now select your answer according to the
coding scheme given below:
A) Both (A) and (R) are true
B) (A) is true, but (R) is false
C) (A) is
false, but (R) is true
D) Both (A) and (R) are false
Answer : (D)
2010
61. What is the correct value of q if X= cos q satisfies x^{2}3x+2=0
?
A) 1 B) 0
C) 1 D) p
Answer : (B)
62. When the basis of classification is
according to location or place, the classification is called ……..
classification.
A) Quantitative B) Geographical
C) Qualitative D) Chronological
Answer : (B)
1 i i 1
63. If A =
i 1 , and B=
1 1 , then AB is
1 0
i 0
A) 0 1 B) 0
i
0 0 i 0
C) 0 0 D) 0
1
Answer : (C)
64. It is given that 2^{22} + 1 is
completely divisible by a whole number. which of the following numbers is
completely divisible by that number?
A) 2^{
16+1} B) 2^{
161}
C) 7
X 2^{33} D) 2^{ 96+1}
Answer : (D)
65. Data verbalized on a continuum scale like
excellent, good, fair and poor
are known as
A) Raw data B) Ratio data
C) Interval
data D) Ordinal data
Answer : (D)
66. A can do piece of work in 80 days. He
alone works at it for 20 days and then B alone finished the remaining work in
36 days. In how many days can A and B
together complete the work?
A) 25 days B) 30 days
C) 35 days D) 40 days
Answer : (B)
67. The average of 25 results is 18. The
average of first twelve of them is 14 and that of last twelve is 17. The
thirteenth result is
A) 87 B) 78
C) 67 D) none of these
Answer : (B)
68. A girl started walking from her house,
She first walked for 3 km towards east, then she turned towards north and moved
4 km in that direction.
How far is the girl away
from her house?
A) 3 km south B) 3 km
north
C) 5 km west D) 5 km north  east
Answer : (D)
1: 1: 1
69. The sides of a triangle are in the ratio
of 2
3 4 , If the perimeter is 52 cm
then the length of the smallest side
is
A) 9 cm B) 10 cm
C) 11cm D) 12
cm
Answer : (D)
70. The average based on the position of
ordered observation is
A) X B) Median
C) Mode D) Standard Deviation
Answer : (B)
71. A current of 8 A flows through 10 turn
coil of a tangent galvanometer having a diameter of 16 cm. The field on the
centre of the coil is
A) 2.5 Aturn/m B) 25
Aturn/m
C) 100 A
turn/m D) 250 Aturn/m
Answer : (B)
72. Find the missing number:
? 2
730 28
344 126
A) 1000 B) 1001
C) 999 D) 1002
Answer : (B)
73. If log_{a} (ab) = x, then log_{b}
(ab) is
1 x
A) x B) x + 1
x x
C) 1  x D) x  1
Answer : (A)
74. The area of a circle is 220 sq. cm. The
area of the biggest square inscribed in the circle will be
A) 49 cm^{2} B) 70
cm^{2}
C) 140 cm^{2} D) 150 cm^{2}
Answer : (C)
75. The ages of Ravi and Raja are in the
ratio 5:12. After 6 years, the ratio of their ages will be 8:15. What is the
difference between their ages?
A) 14 years B) 16 years
C) 12 years D) 13 years
Answer : (A)
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