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  • Question
  • The average weight of 60 students in a class was calculated to be 40 kg. Later it was found out that the weight of one of the students was calculated as 36 kg, whereas his actual weight was 33 kg. What is the actual average weight of the students in the class?


  • Options
  • A. 39.90 kg
  • B. 39.95 kg
  • C. 39 kg
  • D. 38 kg

  • Correct Answer
  • 39.95 kg 

    Explanation

    Total correct weight = (40 x 60) - 36 + 33 = 2400 - 3 = 2397 kg
    ? Required average weight = 2397/60 = 39.95 kg


  • More questions

    • 1. 
      198.995 x 12.005 + 16.25 x 6.95 =?

    • Options
    • A. 2580
    • B. 2550
    • C. 2400
    • D. 2500
    • Discuss
    • 2. 
      The face value of 8 in the numeral 458926 is?

    • Options
    • A. 8000
    • B. 8
    • C. 1000
    • D. 458000
    • Discuss
    • 3. 
      6, 9, 15, 21, 24, 28, 30?

    • Options
    • A. 25
    • B. 21
    • C. 24
    • D. 30
    • Discuss
    • 4. 
      6674 x 625 =?

    • Options
    • A. 4170160
    • B. 4072360
    • C. 4171050
    • D. 4171250
    • Discuss
    • 5. 
      If ax + by = 6, bx ? ay = 2 and x 2 + y 2 = 4, then the value of ( a 2 + b 2) would be :

    • Options
    • A. 10
    • B. 2
    • C. 4
    • D. 5
    • Discuss
    • 6. 
      What if the probability of getting a king or a queen in a single drawn from a pack of 52 cards?

    • Options
    • A. 1/26
    • B. 1/13
    • C. 2/13
    • D. None of these
    • Discuss
    • 7. 
      Find the 4th proportional to 4 , 16 and 7 ,

    • Options
    • A. 28
    • B. 29
    • C. 22
    • D. 25
    • Discuss
    • 8. 
      Raj sold an item for ? 6384 and incurred a loss of 30%. At what price should he have sold the item to have gained a profit of 30%

    • Options
    • A. ? 14656
    • B. ? 11856
    • C. ? 13544
    • D. cannot be determind
    • Discuss
    • 9. 
      (2/3) x (6/8) x (2/3) x (3/4) =?

    • Options
    • A. 0.25
    • B. 0.5
    • C. 1.45
    • D. 11.8
    • Discuss
    • 10. 
      The HCF and LCM of two natural numbers are 12 and 72, respectively. What is the difference between the two numbers, if one of the number is 24?

    • Options
    • A. 12
    • B. 18
    • C. 21
    • D. 24
    • Discuss


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