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 Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
If the mean of a frequency distribution is 100 and the coefficient of variation is 45%, then what is the value of the variance?
A
2025
B
450
C
45
D
4.5
2
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
For which of the following sets of numbers do the mean, median and mode have the same value?
A
12, 12, 12, 12, 24
B
6, 18, 18, 18, 30
C
6, 6, 12, 30, 36
D
6, 6, 6, 12, 30
3
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
The mean of 12 observations is 75. If two observation are discarded, then the mean of the remaining observations is 65. What is the mean of the discarded observations?
A
250
B
125
C
120
D
Cannot be determined due to insufficient data
4
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
The average of a set of 15 observations is recorded, but later it is found that for one observation, the digit in the tens place was wrongly recorded as 8 instead of 3. After correcting the observation, the average is
A
reduced by $\dfrac{1}{3}$
B
increased by $\dfrac{10}{3}$
C
reduced by $\dfrac{10}{3}$
D
reduced by 50