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Quantitative practice

Averages Questions with Answers

Mean of a set, weighted averages, and what happens to an average when one member enters or leaves. This page pools every averages question on the site (225 of them, from 65 exams, weighted towards Management, Banking, Railways) so you can drill the topic on its own instead of meeting four of them inside a full paper.

7% of the pool is graded hard on this site’s own scale and 29% easy, which is gentler than the average topic in this section.

Questions
225
Practice set
25 in 25 min
Difficulty
66/143/16
Negative marking
None
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Averages questions with solutions

6 from the 225-question pool, worked in full.

  1. 1. The average of 7 numbers is 30. If one number is removed, the average of the remaining 6 becomes 28. Find the removed number.

    • A. 38
    • B. 46
    • C. 40
    • D. 42 ✓

    Solution. Sum of 7 numbers = 210. Sum of remaining 6 = 168. Removed number = 210 − 168 = 42.

  2. 2. Find the average of 15, 21, 27, 33, and 39.

    • A. 25
    • B. 29
    • C. 27 ✓
    • D. 23

    Solution. Average = (15 + 21 + 27 + 33 + 39) / 5 = 135 / 5 = 27.

  3. 3. Find the average of 12, 16, 20 and 24.

    • A. 16
    • B. 18 ✓
    • C. 17
    • D. 19

    Solution. The sum is 72, and 72 divided by 4 is 18.

  4. 4. Find the average of 15, 25, 35, 45, and 55.

    • A. 30
    • B. 32
    • C. 38
    • D. 35 ✓

    Solution. Average = (15+25+35+45+55)/5 = 175/5 = 35.

  5. 5. The average weight of 6 boys is 52 kg. A seventh boy joins, and the new average becomes 53 kg. Find the seventh boy's weight.

    • A. 57 kg
    • B. 59 kg ✓
    • C. 58 kg
    • D. 60 kg

    Solution. Total weight of 6 boys = 6 × 52 = 312 kg. New total = 7 × 53 = 371 kg. Seventh boy's weight = 371 − 312 = 59 kg.

  6. 6. The average of 10 numbers is 45. Each number is increased by 4 and the result is then doubled. Find the new average.

    • A. 100
    • B. 90
    • C. 94
    • D. 96
    • E. 98 ✓

    Solution. Adding 4 raises the average to 49, and doubling every value doubles the average to 98.

Exams that set Averages

12 categories, led by Management, Banking, Railways.

    Drawn from AEEE, AFCAT, ATMA, CAT, CDS, CLAT, CMAT, CSIR NET, DSSSB TGT, GMAT, HTET, IBPS Clerk, IBPS PO, IBPS RRB Office Assistant, IBPS RRB Officer Scale I, IBPS SO, IBSAT, IMU-CET, INET, IPMAT Indore, IPMAT Rohtak, JAIN JET, JIPMAT, KMAT Karnataka, KSDAT, KVS PRT, LIC AAO, MAH MBA CET, MAH UG CET, MAT, MH CET Law, MICAT, MPPSC SSE, NABARD Grade A, NCHM JEE, NIACL AO, NIFT, NIPER JEE, NMAT, OPSC OCS, RBI Assistant, RBI Grade B, RPF Constable, RPF Sub-Inspector, RRB Group D, RRB Junior Engineer, RRB NTPC, RRB Paramedical, SBI Clerk, SBI PO, SEBI Grade A, SIDBI Grade A & B, SNAP, SSC CGL, SSC CHSL, SSC CPO, SSC GD Constable, SSC MTS, SSC Selection Post, TANCET MBA, TG LAWCET, UKPSC PCS, UPPSC PCS, UPSC CSE, XAT. Browse all exams.

    Averages: frequently asked questions

    How many averages questions are there?

    225, from the 65 exams here whose syllabus sets the topic. 29% are graded easy and 7% hard, which makes averages one of the more tractable topics in this section, against a 17% average.

    Which exams ask averages questions?

    65 of the exams on this site, weighted towards Management (16), Banking (14), Railways (6). Every question in this pool comes from one of their own mock tests, so the list below is the honest answer to whether the topic is worth your time.

    Is averages hard?

    7% of these 225 questions are graded hard and 29% easy, making it one of the more tractable topics in this section, against a 17% average.

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