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The average weight of 20 girls was recorded as 54 kgm. If the weight of teacher is added, the average increased by 1 kg. The teachers weight is
  • a)
    72 kg                                   
  • b)
    73 kg
  • c)
    74 kg                        
  • d)
    75 kg
  • e)
    None of these
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The average weight of 20 girls was recorded as 54 kgm. If the weight o...
Given that average is 54 kg for 15 girls.
(Sum of weight of 15 girls) / 15 = 54
Sum of weight of 15 girls = 15 x 54 = 810
Now weight of teacher is also added so the average becomes 54 + 1 kg = 55 kg
(Sum of weight of 15 girls + Weight of teacher ) / (15 girls + 1 teacher)  = New average = 55 (Given)
(810 + Weight of teacher ) / (16) = 55 + 1
810 + Weight of teacher = 16 (56)
Weight of teacher = 896 - 810 = 86 kg
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Most Upvoted Answer
The average weight of 20 girls was recorded as 54 kgm. If the weight o...
Given that average is 54 kg for 15 girls.
(Sum of weight of 15 girls) / 15 = 54
Sum of weight of 15 girls = 15 x 54 = 810
Now weight of teacher is also added so the average becomes 54 + 1 kg = 55 kg
(Sum of weight of 15 girls + Weight of teacher ) / (15 girls + 1 teacher)  = New average = 55 (Given)
(810 + Weight of teacher ) / (16) = 55 + 1
810 + Weight of teacher = 16 (56)
Weight of teacher = 896 - 810 = 86 kg
So, the correct option is 'D'
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Community Answer
The average weight of 20 girls was recorded as 54 kgm. If the weight o...
Let,total weight of 20 girls be'x'Then,x/20=54.So,x=1080Now,let teacher's weight be 'y'kgmNew average be,1080+y/22=54+1(as average increase by 1kg)Hence,y=1155-1080=75So, teacher weight is 75 kgm
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The average weight of 20 girls was recorded as 54 kgm. If the weight of teacher is added, the average increased by 1 kg. The teachers weight isa)72 kgb)73 kgc)74 kgd)75 kge)None of theseCorrect answer is option 'D'. Can you explain this answer?
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The average weight of 20 girls was recorded as 54 kgm. If the weight of teacher is added, the average increased by 1 kg. The teachers weight isa)72 kgb)73 kgc)74 kgd)75 kge)None of theseCorrect answer is option 'D'. Can you explain this answer? for Quant 2024 is part of Quant preparation. The Question and answers have been prepared according to the Quant exam syllabus. Information about The average weight of 20 girls was recorded as 54 kgm. If the weight of teacher is added, the average increased by 1 kg. The teachers weight isa)72 kgb)73 kgc)74 kgd)75 kge)None of theseCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Quant 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The average weight of 20 girls was recorded as 54 kgm. If the weight of teacher is added, the average increased by 1 kg. The teachers weight isa)72 kgb)73 kgc)74 kgd)75 kge)None of theseCorrect answer is option 'D'. Can you explain this answer?.
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