Algebra
Sets, Relations and Functions
MCQ (Single Correct Answer)
Quadratic Equations and Inequalities
MCQ (Single Correct Answer)
Sequence And Series
MCQ (Single Correct Answer)
Permutations and Combinations
MCQ (Single Correct Answer)
Three Dimensional Geometry
MCQ (Single Correct Answer)
Trigonometry
Trigonometric Angles and Equations
MCQ (Single Correct Answer)
Inverse Trigonometric Function
MCQ (Single Correct Answer)
Height and Distance
MCQ (Single Correct Answer)
Properties of Triangles
MCQ (Single Correct Answer)
Calculus
Limit, Continuity and Differentiability
MCQ (Single Correct Answer)
Application of Derivatives
MCQ (Single Correct Answer)
Indefinite Integration
MCQ (Single Correct Answer)
Definite Integration
MCQ (Single Correct Answer)
Area Under The Curves
MCQ (Single Correct Answer)
Differential Equations
MCQ (Single Correct Answer)
1
NDA 2016 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If the covariance between x and y is 30, variance of x is 25 and variance of y is 144, then what is the correlation coefficient?
A
0.4
B
0.5
C
0.6
D
0.7
2
NDA 2016 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
A random sample of 20 people is classified in the following table according to their ages.

Age Frequency
15-25 2
25-35 4
35-45 6
45-55 5
55-65 3


What is the mean age of this group of people?
A
41.0
B
41.5
C
42.0
D
42.5
3
NDA 2016 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
What is the mean deviation from the mean of the numbers 10, 9, 21, 16, 24 ?
A
5.2
B
5.0
C
4.5
D
4.0
4
NDA 2016 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
If the total number of observations is 20, $$\sum {x_i^{}} $$ = 1000 and $$\sum {x_i^2} $$ = 84000, then what is the variance of the distribution?
A
1500
B
1600
C
1700
D
1800