Quantitative Aptitude - Arithmetic - Averages - The average height of 22 toddlers
Quantitative Aptitude - Arithmetic - Averages
Question
The average height of 22 toddlers increases by 2 inches when two of them leave this group. If the average height of these two toddlers is one-third the average height of the original 22, then the average height, in inches, of the remaining 20 toddlers is
A) 30
B) 28
C) 32
D) 26
Answer
Option (C)
Solution
From CAT 2017 - Quantitative Aptitude - Arithmetic - Averages, we can see that,

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Quantitative Aptitude - Arithmetic - Averages - A class consists of 20 boys
Quantitative Aptitude - Arithmetic - Averages
Question
A class consists of 20 boys and 30 girls. In the mid-semester examination, the average score of the girls was 5 higher than that of the boys. In the final exam, however, the average score of the girls dropped by 3 while the average score of the entire class increased by 2. The increase in the average score of the boys is
A) 9.5
B) 10
C) 4.5
D) 6
Answer
Option (A)
Solution
As per CAT 2017 - Qua

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Quantitative Aptitude â€“ Arithmetic - Averages â€“ In an apartment complex, the number
Slot -1 â€“Â Quantitative Aptitude â€“ Arithmetic - Averages â€“ In an apartment complex, the number
In an apartment complex, the number of people aged 51 years and above is 30 and there are at most 39 people whose ages are below 51 years. The average age of all the people in the apartment complex is 38 years. What is the largest possible average age, in years, of the people whose ages are below 51 years?
a) 27
b) 25
c) 26
d) 28
Answer: d)

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Quantitative Aptitude â€“ Arithmetic - Averages â€“ A CAT aspirant appears for a certain number
Slot -1 â€“Â Quantitative Aptitude â€“ Arithmetic - Averages â€“ A CAT aspirant appears for a certain number
A CAT aspirant appears for a certain number of tests. His average score increases by 1 if the first 10 tests are not considered, and decreases by 1 if the last 10 tests are not considered. If his average scores for the first 10 and the last 10 tests are 20 and 30, respectively, then the total number of tests taken by him is?
Answer:

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