Day 236: CDS Maths

5 questions (9 parts). Try each one first, then open its answer.

Question 1
Sets. Asked once: CDS 2 2026
33 $Consider the following statements : I. If A is a subset of U and U is the Universal set, then the complement of the set A is also a subset of U. II. The complement of a Universal set is a singleton set. Which of the statements given above is/are correct ?$
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Question 2
Simple and Compound Interest. Asked once: CDS 1 2024
44 $A sum of money invested at simple interest triples itself in 8 years and becomes n times in 20 years. What is the value of n ?$
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Question 3 (case study, 5 parts)
Statistics. Asked once: CDS 1 2025
Consider the following for the next five (05) items that follow : The frequency distribution of 205 observations on X is given below :
X 3 5 6 7
Frequency f f + 2 f - 3 f + 6
86 $What is the value of f ?$
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87 $What is the median of the frequency distribution ?$
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88 $What is the mode of the frequency distribution ?$
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89 $What is the most appropriate graphical representation of the given frequency distribution of X ?$
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90 $What is the mean of the frequency distribution ?$
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Question 4
Surds, Indices and Simplification. Asked once: CDS 1 2026
1 $p + q + r = 0$
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Question 5
Time and Work. Asked once: CDS 1 2023
36 $x$
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Question 1