Day 112: CDS Maths

5 questions (6 parts). Try each one first, then open its answer.

Question 1
Ratio, Proportion and Variation. Asked once: CDS 2 2024 (same type asked 3 times) See all 3 of this type
86 $A$
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Question 2
Statistics. Asked once: CDS 1 2026 (same type asked 3 times) See all 3 of this type
38 $The arithmetic mean of 100 observations is 50. If 10 is added to each observation then what will be the new arithmetic mean ?$
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Question 3
Statistics. Asked once: CDS 2 2022 (same type asked 3 times) See all 3 of this type
65 $4,\ 7,\ 10,\ 14,\ 2x + 3,\ 2x + 5,\ 22,\ 23,\ 30,\ 50$
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Question 4 (case study, 2 parts)
Statistics. Asked once: CDS 2 2024 (same type asked 3 times) See all 3 of this type
A frequency distribution is as follows :
Marks 18-26 27-35 36-44 45-53 54-62 63-71 72-80
Number of students 5 7 10 15 8 3 2
54 $What is the median of the distribution ?$
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55 $What is the mode of the distribution ?$
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Question 5
Statistics. Asked once: CDS 2 2025 (same type asked 3 times) See all 3 of this type
93 $The frequency distribution of marks of 100 candidates in a particular examination is as follows : Marks Number of Candidates More than 10 100 More than 20 75 More than 30 60 More than 40 40 What are the average marks of the candidates?$
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Question 1