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In a boat there are 8 men whose average weight is increased by 1 kg when 1 man of 60 kg is replaced by a new man. What is weight of new comer?

A. 70 kg

B. 66 kg

C. 68 kg

D. 69 kg

Answer: Option C

Solution(By Examveda Team)

Member in group × age increased = difference of replacement
Or, 8 × 1 = new comer - man going out
Or, new comer = 8 + 60
Or, new comer = 68 kg.

This Question Belongs to Arithmetic Ability >> Average

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Comments ( 4 )

  1. Suprakash Dasmahapatra
    Suprakash Dasmahapatra :
    1 year ago

    8(x+1)-N=8x-60
    N=68

  2. Topazing Sohkhia
    Topazing Sohkhia :
    3 years ago

    I think the unit should be in kg not year as given.

  3. Anusha Bhatia
    Anusha Bhatia :
    5 years ago

    Suppose, the average weight of 8 men before replacement is x, Hence total weight of 8 men would be 8x. Now, let's say the weight of the new man is y. Hence, replacement can be represented with following equation

    8x + y - 60 ………(1)

    Now, due to replacement, average weight of boat has increases by 1 I.e. x + 1

    So, New total weight of the 8 men can be represented by following equation

    8(x+1) …………(2)

    But equation (1) & (2) are equal, as both of them represents new total weight on boat.

    Hence,

    8x + y - 60 = 8(x + 1)

    8x + y - 60 = 8x + 8

    y - 60 = 8

    y = 68 kg.

    So the weight of the newly added man is 68 kg.

  4. Haritha Devika
    Haritha Devika :
    6 years ago

    new comer = weight of separated member+(increase in average + members in group)
    new comer=60+(1*8)
    =68

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