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RRB Group D Averages — practice questions

Explore 24 free Averages questions in RRB Group D Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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Averages questions and exercises with answers

Showing questions 1–24 of 24.

The average of 0.3, 3, 0.03 and 0.002 is:Read the answer and worked solution →Average, or spread?Read the answer and worked solution →True or false: what an average tells youRead the answer and worked solution →Order the steps: compute a meanRead the answer and worked solution →Averages and spreadRead the answer and worked solution →Complete the contrastRead the answer and worked solution →True or false: reading an average from a reportRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Uses every value, or only some?Read the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Flip and pair: statistic with its jobRead the answer and worked solution →Tap every measure of central tendencyRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Averages in a data questionRead the answer and worked solution →Complete the meanRead the answer and worked solution →Order the steps: compare two groups by averageRead the answer and worked solution →True or false: averages that misleadRead the answer and worked solution →Which number would you quote?Read the answer and worked solution →Averages in practiceRead the answer and worked solution →Assertion and reason: averagesRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Complete the caution about averagesRead the answer and worked solution →Spot the odd one outRead the answer and worked solution →

Worked practice questions

The average of 0.3, 3, 0.03 and 0.002 is:

  1. 833
  2. 0.833
  3. 83.3
  4. 0.803
Show answer and solution

Correct answer: B. 0.833

1. Add the values: 0.3 + 3 + 0.03 + 0.002 = 3.332. 2. Divide the sum by the count, which is 4. 3. 3.332 ÷ 4 = 0.833. _Source: RRB Group D (RRC) PYQ, held 27-10-2013, Q.79._

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Average, or spread?

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Items
  1. Item
    Mean
    Category
    An average
  2. Item
    Median
    Category
    An average
  3. Item
    Describes where the data centres
    Category
    An average
  4. Item
    Range
    Category
    A spread
  5. Item
    Standard deviation
    Category
    A spread
  6. Item
    Describes how scattered the data is
    Category
    A spread
Categories
  1. Item
    An average
  2. Item
    A spread
An average says where the data sits a measure of dispersion says how scattered it is. Data-interpretation questions ask for both and they are not interchangeable. Source: syllabus Maths, Ch 13 Statistics.

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True or false: what an average tells you

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Questions
  1. Statement is true
    Yes
    Statement
    An average is a measure of central tendency.
  2. Statement is true
    Yes
    Statement
    Two sets with the same mean can be spread very differently.
  3. Statement is true
    No
    Statement
    An average alone describes a data set completely.
  4. Statement is true
    Yes
    Statement
    A measure of dispersion is needed as well.
  5. Statement is true
    Yes
    Statement
    The mean uses every observation.
Two data sets can share a mean and look nothing alike. Source: syllabus Maths, Ch 13 Statistics.

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