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  • Territorial Army Officers Exam Elementary Mathematics Study Material

Digitization help student to explore and study their academic courses online, as this gives them flexibility and scheduling their learning at their convenience. Kidsfront has prepared unique course material of Elementary Mathematics Statistics for Territorial Army Officers Exam student. This free online Elementary Mathematics study material for Territorial Army Officers Exam will help students in learning and doing practice on Statistics topic of Territorial Army Officers Exam Elementary Mathematics. The study material on Statistics, help Territorial Army Officers Exam Elementary Mathematics students to learn every aspect of Statistics and prepare themselves for exams by doing online test exercise for Statistics, as their study progresses in class. Kidsfront provide unique pattern of learning Elementary Mathematics with free online comprehensive study material and loads of Territorial Army Officers Exam Elementary Mathematics Statistics exercise prepared by the highly professionals team. Students can understand Statistics concept easily and consolidate their learning by doing practice test on Statistics regularly till they excel in Elementary Mathematics Statistics.


Statistics

The class mark of a class is 10 and its class width is 6. The lower limit of the class is


a)

3


b)

 6


c)

 7


d)

5


✔Answer
Correct Answer Is :

 7

Solution Is :
The median of 20,22,24,26,28,30 is

a)         29
b)         27
c)         23
d)         25


✔Answer
Correct Answer Is :         25
Solution Is :
The mean of first five prime numbers is

a)         4.5
b)         5.6
c)         6.2
d)         6.5


✔Answer
Correct Answer Is :         5.6
Solution Is :
Let m be the mid-point and l be the upper class limit in an upper frequency distribution. The lower class limit of the class is

a)         2m-l
b)         2m+l
c)         m-l
d)         m+l


✔Answer
Correct Answer Is :         2m-l
Solution Is :
If the mean of the observations x,x+3,x+5,x+7,x+10 is 9, the mean of the last three observations is

a)         10 2/3
b)         10 1/3
c)         11 1/3
d)         11 2/3


✔Answer
Correct Answer Is :         11 1/3
Solution Is :
Mode of the data 15,16,14,19,15,20,14,17,15,12,14,15,18,17,15,14,13 is

a)         16
b)         17
c)         14
d)         15


✔Answer
Correct Answer Is :         15
Solution Is :
The mean of 6 observations is 35. If one observation is excluded, the mean becomes 32. The excluded observation is

a)         35
b)         50
c)         46
d)         62


✔Answer
Correct Answer Is :         50
Solution Is :
If each observation of the data is increased by 5, then their mean

a)         is increased by 5
b)         becomes 5 times the original mean
c)         is decreased by 5
d)        remains the same


✔Answer
Correct Answer Is :         is decreased by 5
Solution Is :
The mean of 15 observations is 25. If the mean of first 8 observations is 20 and that of last 8 observations is 30, then the 9th observation is

a)         25
b)         30
c)         27.5
d)         22.5


✔Answer
Correct Answer Is :         25
Solution Is :
The mean weight of 20 students is 65 kg. On including the teacher`s weight, the mean weight becomes 65.5 kg. The weight of the teacher is

a)         85
b)         78
c)         75.5
d)         67.5


✔Answer
Correct Answer Is :         75.5
Solution Is :
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