Day 173: CDS Maths

5 questions (7 parts). Try each one first, then open its answer.

Question 1
Statistics. Asked once: CDS 2 2025 (same type asked 3 times) See all 3 of this type
94 $The arithmetic mean of 200 observations is 60. If 5 is multiplied to each observation, then what will be the new arithmetic mean?$
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Question 2 (case study, 2 parts)
Statistics. Asked once: CDS 1 2023 (same type asked 3 times) See all 3 of this type
Consider the following data for the next two (02) items that follow :
Class 0 - 30 30 - 60 60 - 90 90 - 120
Frequency 4 5 7 4
81 $What is the mode of the distribution ?$
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82 $7(Q - P) = 9R$
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Question 3 (case study, 2 parts)
Statistics. Asked once: CDS 1 2023 (same type asked 3 times) See all 3 of this type
Consider the following data for the next two (02) items that follow :
Class 40 - 50 50 - 60 60 - 70 70 - 80
Frequency 4 3 1 2
83 $What is the mean of the distribution ?$
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84 $If M is the median, then what is the value of 3M ?$
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Question 4
Triangles. Asked once: CDS 2 2017 (same type asked 3 times) See all 3 of this type
77 $In a triangle ABC, the medians AD and BE intersect at G. A line DF is drawn parallel to BE such that F is on AC. If AC = 9 cm, then what is CF equal to ?$
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Question 5
Inequalities. Asked once: CDS 1 2022 (same type asked 3 times) See all 3 of this type
41 $3x + 2y$
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Question 1