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Why Aptitude Averages is Required?

In this Aptitude section you can learn and practice Aptitude Questions with Answers based on "Averages" to improve your skills in order to face written test by IT companies, interview and various entrance tests like Bank Exams, Railway Exams,ICET, GATE, CAT, GRE, MAT, etc.

Where can I get Aptitude Averages Questions and Answers with Explanation?

AllIndiaExams provides you lots of fully solved Aptitude Averages questions and answers with explanation. Fully solved examples with detailed answer description. All students, freshers can download Aptitude quiz questions with answers as PDF files and eBooks.

Where can I get objective type, multiple choice Aptitude Averages Interview Questions and Answers?

Here you can find both objective type and Multiple Choice Aptitude Averages questions and answers for interview and entrance examination. True or false type questions are also provided here. Practice these bits well to get success in interviews or entrance tests

How to solve these Aptitude Averages problems?

You no need to worry, we have given lots of solved Aptitude Averages questions with detailed explanation and also we have provided lots of short cut methods to quickly solve the questions within short time. So you can easily solve all kind of questions.

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Averages - Aptitude Questions and Answers

This is aptitude questions and answers section on Averages with explanations for various interviews, competitive examinations and entrance tests. Learn and practice the Averages Aptitude Quiz Questions and Answers which we have provided below. Through this page, aspirants will know about Averages Questions and Answers, Averages Quiz/ Online Test, Averages Formulae, and more details. Therefore, we recommend students that try to take the Averages Quiz Quiz Online Test as much as they can.

Averages Formulae

1. Average
Average = (Sum of observations/Number of observations)
2. Average Speed
Suppose a man covers a certain distance at X kmph and an equal distance at Y kmph.
Then, the average speed during the whole journey is {2xy/(x+y)} kmph.
6. The average of first 10 prime numbers is?
  • A. 10
  • B. 12.5
  • C. 12.9
  • D. 15.5
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Answer & Explanation

Answer: Option C

Explanation:

Sum of 10 prime no. = 129

Average = 129/10 = 12.9

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7. The average age of three boys is 15 years and their ages are in proportion 3:5:7. What is the age in years of the youngest boy?
  • A. 15
  • B. 9
  • C. 18
  • D. 21
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Answer & Explanation

Answer: Option B

Explanation:

3x + 5x + 7x = 45

x =3 

3x = 9

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8. The average of 1st 3 of 4 numbers is 16 and of the last 3 are 15. If the sum of the first and the last number is 13. What is the last numbers?
  • A. 8
  • B. 6
  • C. 5
  • D. 2
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Answer & Explanation

Answer: Option C

Explanation:

A + B + C = 48

B + C + D = 45

A + D = 13

      A “ D =   3

      A + D = 13


2D = 10 

D = 5 

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9. The average of 9 observations was 9, that of the 1st of 5 being 10 and that of the last 5 being 8. What was the 5th observation?
  • A. 9
  • B. 8
  • C. 7
  • D. 6
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Answer & Explanation

Answer: Option A

Explanation:

1 to 9 = 9 * 9 = 81

1 to 5 = 5 * 10 = 50

5 to 9 = 5 * 8 = 40

5th = 50 + 40 = 90 “ 81 = 9  

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10. The average of 10 numbers is calculated as 15. It is discovered later on that while calculating the average, one number namely 36 was wrongly read as 26. The correct average is?
  • A. 12.4
  • B. 14
  • C. 16
  • D. 18.6
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Answer & Explanation

Answer: Option C

Explanation:

10 * 15 + 36 “ 26 = 160/10 = 16

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