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  • Question
  • The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person ?


  • Options
  • A. 70 kg
  • B. 75 kg
  • C. 80 kg
  • D. 85 kg

  • Correct Answer
  • 85 kg 

    Explanation

    Total weight increased = (8 x 2.5) kg = 20 kg.

    Weight of new person = (65 + 20) kg = 85 kg.


  • Average problems


    Search Results


    • 1. A grocer has a sale of Rs 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs, 6500 ?

    • Options
    • A. 4991
    • B. 5467
    • C. 5987
    • D. 6453
    • Discuss
    • 2. The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero ?

    • Options
    • A. 0
    • B. -1
    • C. 1
    • D. none of these
    • Discuss
    • 3. The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next innings so as to increase his average of runs by 4 ?

    • Options
    • A. 76
    • B. 79
    • C. 85
    • D. 87
    • Discuss
    • 4. A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Find his average after 17th inning?

    • Options
    • A. 40
    • B. 39
    • C. 50
    • D. 55
    • Discuss
    • 5. The curved surface area and the slant height of a right circular cone are 99 sq.cm and 9 cm respectively. Find its diameter (in cm)

    • Options
    • A. 3.5
    • B. 7
    • C. 14
    • D. 10.5
    • Discuss
    • 6. The average weight of a class of 24 students is 35 kg. If the weight of the teacher be included, the average rises by 400 g. The weight of the teacher is :

    • Options
    • A. 45 kg
    • B. 46 kg
    • C. 47 kg
    • D. 48 kg
    • Discuss
    • 7. Sharon Stone deposits $2000 at the end of each year in an account earning 10% compounded annually. Determine how much money she has after 25 years. How much interest did she earn?

    • Options
    • A. 146694.12
    • B. 13452
    • C. 18232
    • D. 15627
    • Discuss
    • 8. The mean temperature of Monday to Wednesday was 37 degree celsius and of Tuesday to Thursday was 34 degree celsius . If the temperature on Thursday was (4/5) th that of Monday, the temperature on Thursday was?

    • Options
    • A. 38 degree celsius
    • B. 36 degree celsius
    • C. 40 degree celsius
    • D. 39 degree celsius
    • Discuss
    • 9. A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half. The number of pupils in the class is :

    • Options
    • A. 45
    • B. 40
    • C. 39
    • D. 37
    • Discuss
    • 10. The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is :

    • Options
    • A. 35
    • B. 36.5
    • C. 40
    • D. 42
    • Discuss


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