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  • NDA Exam 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 Mathematics Statistical for NDA Exam student. This free online Mathematics study material for NDA Exam will help students in learning and doing practice on Statistical topic of NDA Exam Mathematics. The study material on Statistical, help NDA Exam Mathematics students to learn every aspect of Statistical and prepare themselves for exams by doing online test exercise for Statistical, as their study progresses in class. Kidsfront provide unique pattern of learning Mathematics with free online comprehensive study material and loads of NDA Exam Mathematics Statistical exercise prepared by the highly professionals team. Students can understand Statistical concept easily and consolidate their learning by doing practice test on Statistical regularly till they excel in Mathematics Statistical.


Statistical
The average marks secured by 36 students was 52. but it was discovered that an item 64 was misred as 64.what is the correct mean of mark?

a) 54
b) 53.5
c) 53
d) 52.5


✔Answer
✔Solution
Correct Answer Is : 52.5
Solution Is : Correct mean=52*36-46+64/36
52*36+18/36
104+1/2=105/2=52.5
The mean high temperature of the first four days of a week is 25°C whereas the mean of the last four days is 25.5°C. If the mean of the whole week is 25.2°C, then the temperature of the 4th day is

a) 25.2°C
b) 25.5°C
c) 25.6°C
d) 25°C


✔Answer
✔Solution
Correct Answer Is : 25.6°C
Solution Is : Average higher temperature of four days = 25oC
Total higher temperature of four days = 4 x 25 = 100oC
Average temperature of four days = 25.5oC
Total temperature of these four days = 4 x 25.5 = 102oC
Average temperature of a week = 7 x 25.2 = 176.4oC
Hence, temperature of fourth day = (100 + 102) - 176.4 = 25.6oC

Facts or information collected with a definite purpose is called


a) Median
b) Data
c) Bar chart
d) Histogram


✔Answer
Correct Answer Is : Data
Solution Is :
When the information is gathered from a source which already has the information stored, then the data is called

a)         Fictitious data
b)         Primary data
c)         Secondary data
d)        Useless data


✔Answer
Correct Answer Is :         Secondary data
Solution Is :
Class mark equals to

a)         Lower limit+upper limit/2
b)         Lower limit+upper limit
c)         Upper limit-lower limit
d)         Upper limit-lower limit/2


✔Answer
Correct Answer Is :         Lower limit+upper limit/2
Solution Is :
The lower limit of 45-51 is

a)         55
b)         40
c)         45
d)         51


✔Answer
Correct Answer Is :         45
Solution Is :
In the following frequency distribution, the number of students of age less than 25 years is

a)         22
b)         19
c)         30
d)         26


✔Answer
Correct Answer Is :         26
Solution Is :
If the range of distribution is 60 and the class interval is 10, then the number of classes is

a)         5
b)         6
c)         7
d)         9


✔Answer
Correct Answer Is :         6
Solution Is :
Range of the following data is 54,36,96,42,38,64,72,36,68,46

a)         46
b)         50
c)         60
d)         34


✔Answer
Correct Answer Is :         60
Solution Is :
In the distribution, the frequency of the class 3-5 is 4,8,3,6,7,2,3,5,9,4,6,5,5

a)         3
b)         7
c)         4
d)         5


✔Answer
Correct Answer Is :         4
Solution Is :
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