1
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The standard deviation $$\sigma$$ of the first N natural numbers can be obtained using which one of the following formulae?
2
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If V is the variance and M is the numbers, then what is V + M2 equal to ?
3
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If the range of a set of observations on a variable X is known to be 25 and if Y = 40 + 3X, then what is the range of the set of corresponding observations on Y?
4
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Mean of 100 observations is 50 and standard deviation is 10. If 5 is added to each observation, then what will be the new mean and new standard deviation respectively?
Questions Asked from Statistics (Marks 2.5)
Number in Brackets after Paper Indicates No. of Questions
NDA Subjects
Mathematics
Algebra
Sets, Relations and Functions Logarithms Quadratic Equations and Inequalities Sequence And Series Binomial Theorem Matrices Determinants Permutations and Combinations Probability Complex Numbers Vector Algebra Three Dimensional Geometry Statistics
Trigonometry
Trigonometric Angles and Equations Inverse Trigonometric Function Height and Distance Properties of Triangles
Coordinate Geometry
Calculus
English
General Studies