CAT Exam  >  CAT Questions  >  Student was supposed to calculate the average... Start Learning for Free
Student was supposed to calculate the average of 10 numbers. He calculated the average as 261 but mistakenly took 34 instead of 43 and counted 12 twice. What is the actual average of 10 numbers?
  • a)
    260
  • b)
    260.4
  • c)
    260.7
  • d)
    261.4
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Student was supposed to calculate the average of 10 numbers. He calcul...
Average of 10 numbers calculated = 261
As, 43 was mistakenly taken as 34,
deviation = 43-34 = 9
Also, 12 was counted twice, therefore, 12 needs to subtracted as well.

Total deviation = 9 +(- 12) = -3
Correct mean = incorrect mean + total deviation
             = 261 - 0.3
             = 260.7

This question is part of UPSC exam. View all CAT courses
Most Upvoted Answer
Student was supposed to calculate the average of 10 numbers. He calcul...
To calculate the actual average of the 10 numbers, we need to find the sum of the numbers and divide it by 10.

Given data:
- The student calculated the average as 261.
- The student mistakenly took 34 instead of 43.
- The student counted 12 twice.

Let's find the sum of the 10 numbers:
Sum = 10 * 261 = 2610

Mistaken numbers:
The student took 34 instead of 43, so we need to subtract 34 and add 43 to the sum.
New sum = 2610 - 34 + 43 = 2619

The student counted 12 twice, so we need to subtract one 12 from the sum.
New sum = 2619 - 12 = 2607

Now, we can calculate the actual average:
Average = Sum / Number of terms
Average = 2607 / 10 = 260.7

Therefore, the actual average of the 10 numbers is 260.7, which corresponds to option C.
Attention CAT Students!
To make sure you are not studying endlessly, EduRev has designed CAT study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in CAT.
Explore Courses for CAT exam
Student was supposed to calculate the average of 10 numbers. He calculated the average as 261 but mistakenly took 34 instead of 43 and counted 12 twice. What is the actual average of 10 numbers?a)260b)260.4c)260.7d)261.4Correct answer is option 'C'. Can you explain this answer?
Question Description
Student was supposed to calculate the average of 10 numbers. He calculated the average as 261 but mistakenly took 34 instead of 43 and counted 12 twice. What is the actual average of 10 numbers?a)260b)260.4c)260.7d)261.4Correct answer is option 'C'. Can you explain this answer? for CAT 2024 is part of CAT preparation. The Question and answers have been prepared according to the CAT exam syllabus. Information about Student was supposed to calculate the average of 10 numbers. He calculated the average as 261 but mistakenly took 34 instead of 43 and counted 12 twice. What is the actual average of 10 numbers?a)260b)260.4c)260.7d)261.4Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for CAT 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Student was supposed to calculate the average of 10 numbers. He calculated the average as 261 but mistakenly took 34 instead of 43 and counted 12 twice. What is the actual average of 10 numbers?a)260b)260.4c)260.7d)261.4Correct answer is option 'C'. Can you explain this answer?.
Solutions for Student was supposed to calculate the average of 10 numbers. He calculated the average as 261 but mistakenly took 34 instead of 43 and counted 12 twice. What is the actual average of 10 numbers?a)260b)260.4c)260.7d)261.4Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for CAT. Download more important topics, notes, lectures and mock test series for CAT Exam by signing up for free.
Here you can find the meaning of Student was supposed to calculate the average of 10 numbers. He calculated the average as 261 but mistakenly took 34 instead of 43 and counted 12 twice. What is the actual average of 10 numbers?a)260b)260.4c)260.7d)261.4Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Student was supposed to calculate the average of 10 numbers. He calculated the average as 261 but mistakenly took 34 instead of 43 and counted 12 twice. What is the actual average of 10 numbers?a)260b)260.4c)260.7d)261.4Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Student was supposed to calculate the average of 10 numbers. He calculated the average as 261 but mistakenly took 34 instead of 43 and counted 12 twice. What is the actual average of 10 numbers?a)260b)260.4c)260.7d)261.4Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Student was supposed to calculate the average of 10 numbers. He calculated the average as 261 but mistakenly took 34 instead of 43 and counted 12 twice. What is the actual average of 10 numbers?a)260b)260.4c)260.7d)261.4Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Student was supposed to calculate the average of 10 numbers. He calculated the average as 261 but mistakenly took 34 instead of 43 and counted 12 twice. What is the actual average of 10 numbers?a)260b)260.4c)260.7d)261.4Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice CAT tests.
Explore Courses for CAT exam

Top Courses for CAT

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev