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 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Consider the following discrete frequency distribution.

Image

What is the value of median of the distribution ?
A
4
B
5
C
6
D
7
2
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The mean of 5 observations is 4.4 and variance is 8.24. If three of the five observations are 1, 2 and 6, then what are the other two observations?
A
9, 16
B
9, 4
C
81, 16
D
81, 4
3
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The class marks in a frequency table are given to be 5, 10, 15, 20, 25, 30, 35, 40, 45, 50. The class limits of the first five classes are
A
3-7, 7-13, 13-17, 17-23, 23-27
B
2.5-7.5, 7.5-12.5, 12.5-17.5, 17.5-22.5, 22.5-27.5
C
1.5-8.5, 8.5-11.5, 11.5-18.5, 18.5-21.5, 21.5-28.5
D
2-8, 8-12, 12-18, 18-22, 22-28
4
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Arithmetic mean of 10 observations is 60 and sum of squares of deviations from 50 is 5000. What is the standard deviation of the observations?
A
20
B
21
C
22.36
D
24.70