The average of five numbers is 20. If one number is removed, the average of the rest is 22. What was the number removed?
Correct answer: A. 12
- A. 12
- B. 14
- C. 10
- D. 8
Explanation
The original total is 5 multiplied by 20, that is 100, and the remaining four total 4 multiplied by 22, which is 88, so the removed number is 12. Working with totals rather than averages is what makes these questions straightforward. The removed value is below the average, which is why the average of the rest rose.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Logical Problems
Logical problems present several conditions about people, objects, events or choices and require their possible arrangements to be tested. They cover constraint-based reasoning, rankings, matching, grouping, scheduling and elimination, with attention to the difference between a complete solution and a possibility that merely satisfies one condition.
Practise Logical Problems
519 free Logical Problems MCQs from Analytical and Logical Reasoning, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Analytical and Logical Reasoning questions like this
Analytical and Logical Reasoning is on 27 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Logical Problems questions
A train 150 m long travelling at 90 km per hour takes how long to pass a stationary pole?
If 5 workers build a wall in 12 days, how long would 6 workers take, working at the same rate?
A shopkeeper sells an item for Rs. 240 at a profit of 20 per cent. What was the cost price?
In a group of 40 students, 25 study biology and 20 study chemistry. If every student studies at least one of the two, how many study both?
A tank is filled by one pipe in 6 hours and emptied by another in 12 hours. If both are opened together, how long will the tank take to fill?
What is the next number in the series 2, 6, 12, 20, 30, ?