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  • Question
  • If a, b, c, d, e are five consecutive odd number , their average is?


  • Options
  • A. 5 (a + 4)
  • B. abcd/5
  • C. 5 (a + b + c + d + e)
  • D. None of these

  • Correct Answer
  • None of these 

    Explanation

    Since a, b, c, d, e are 5 consecutive numbers so
    b = a + 2.
    c = a + 4.
    d = a + 6.
    e = a + 8.

    Average = (a + b + c + d + e)/ 5
    = [a + (a + 2 ) + (a +4 ) + (a+6 )+ (a+8)] / 5
    = (5a+20) / 5
    = a + 4


  • More questions

    • 1. 
      A man spends average of ? 1694. 70 per month for the first 7 month and ? 1810.50 per month for the next 5 months. His monthly salary if he saves ? 3084.60. during the whole year is?

    • Options
    • A. ? 2400
    • B. ? 3000
    • C. ? 1000
    • D. ? 2000
    • Discuss
    • 2. 
      In the afternoon, a student read 100 pages at the rate of 60 pages/h. In the evening, when she was tired, she read 100 more pages at the rate of 40 pages/h . What was her average rate of reading in pages per hour?

    • Options
    • A. 48
    • B. 50
    • C. 60
    • D. 70
    • Discuss
    • 3. 
      Average weight of three boys P, T and R is 54 1/ 3 kg, while the average weight of three boys T, F and G is 53 kg. What is the average weight of P, T, R, F and G?

    • Options
    • A. 53.8 kg
    • B. 52.4 kg
    • C. 53.4 kg
    • D. Cannot be determined
    • Discuss
    • 4. 
      The average runs scored by a cricketer is 42 innings, is 30. The difference between his maximum and minimum scores in an inning is 100. If these two innings are not taken into consideration, then the average score of remaining 40 inning is 28. Calculate the maximum runs scored by him in an innings?

    • Options
    • A. 125
    • B. 120
    • C. 110
    • D. 100
    • Discuss
    • 5. 
      A cricketer whose bowling average is 12.4 runs per wicket, takes 5 wickets for 26 runs and there by decreases his average by 0.4. Find out the number of wickets taken by him till the last match?

    • Options
    • A. 75
    • B. 81
    • C. 85
    • D. 79
    • Discuss
    • 6. 
      A has double the money of B and B has 50% more money then C. If average money of all the three persons is ? 12000, how money does A have?

    • Options
    • A. ? 211000/11
    • B. ? 315000/11
    • C. ? 216000/11
    • D. ? 316000/11
    • Discuss
    • 7. 
      The average weight of the students in four sections A, B, C and D is 60 kg. The average weight of the students of A, B, C and D individually are 45 kg, 50 kg, 72 kg and 80 kg, respectively. If the average weight of the students of section A and B together is 48 kg and that of B and C together is 60 kg. What is the ratio of the number of the students in sections A and D?

    • Options
    • A. 12 : 7
    • B. 4 : 3
    • C. 3 : 2
    • D. 8 : 5
    • Discuss
    • 8. 
      125.009 + 69.999 + 104.989 =?

    • Options
    • A. 420
    • B. 300
    • C. 285
    • D. 415
    • Discuss
    • 9. 
      503 x 201=?

    • Options
    • A. 101100
    • B. 1000000
    • C. 110000
    • D. 100003
    • Discuss
    • 10. 
      2 3/ 5 x 15/26 x 283.75 =?

    • Options
    • A. 440
    • B. 435
    • C. 410
    • D. 425
    • Discuss


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