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The average weight of 21 boys was recorded
as 64 kgs. If the weight of the teacher was added,
the average increased by 1

By Serenity

The average weight of 21 boys was recorded
as 64 kgs. If the weight of the teacher was added,
the average increased by 1 kg. What was the
teacher’s weight?
(A) 98 kgs
(B) 72 kgs
(C) 64 kgs
(D) 86 kgs​

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Serenity

Which cell organelle is called as ‘power house of cell’?
5. Which cell organelle contains enzymes for ATP production?
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find the distance between the co-ordinate of the points p(2,8) and q (6,8)​

1 thought on “The average weight of 21 boys was recorded<br />as 64 kgs. If the weight of the teacher was added,<br />the average increased by 1”

  1. Answer:

    So, average weight of 21 boys is 64 kg.

    So sum of their weight will be 64×21=1344.

    Now, let the teacher’s weight be x.

    So, average=Sum of no. /no.

    1344+x/22=65

    1344+x=65×22

    1344+x=1430

    x=1430-1344=86

    Ans d) 86kg

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