SSC CGL · Quantitative Aptitude

Averages and ratios

18 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 18 questions

The average of $8$ numbers is $43$ . What is their sum?
The average of $6$ numbers is $42$ . What is their sum?
The average of $4$ numbers is $46$ . What is their sum?
The average of $8$ numbers is $44$ . What is their sum?
The average of $8$ numbers is $24$ . What is their sum?
The average of $6$ numbers is $46$ . What is their sum?
Two numbers are in the ratio $5 : 6$ and their difference is $12$ . What is the larger number?
Two numbers are in the ratio $4 : 7$ and their difference is $15$ . What is the larger number?
Two numbers are in the ratio $7 : 3$ and their difference is $44$ . What is the larger number?
Two numbers are in the ratio $4 : 5$ and their difference is $6$ . What is the larger number?
Two numbers are in the ratio $4 : 8$ and their difference is $44$ . What is the larger number?
Two numbers are in the ratio $5 : 8$ and their difference is $24$ . What is the larger number?
A container holds 80 litres of pure milk. From this container, 8 litres of milk are removed and replaced with water. This replacement procedure is performed a total of two times. How many litres of mi…
The average weight of 24 students in a section is 40 kg. When the weight of the teacher is included, the average increases by 1 kg. What is the weight of the teacher?
In a mixture of 60 litres, the ratio of milk to water is 2:1. How many litres of water must be added to this mixture so that the ratio of milk to water becomes 1:2?
The ratio of the incomes of A and B is 5:4, and the ratio of their monthly expenditures is 3:2. If each saves Rs. 1600 per month, what is the monthly income of A?
The average score of 50 students in an examination was calculated as 44. It was later discovered that a score of 36 was mistakenly entered as 86. What is the corrected average score?
In a vessel containing 40 litres of a mixture, the ratio of milk to water is 3:1. How many litres of water must be added so that the ratio of milk to water becomes 1:3?

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