Question

The mean weight per student in a group of 7 students is 55 kg. The individual weights of 6 of them (in kg) are 52,54,55,53,56 and 54. Find the weight of the seventh student.
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Answer 1

ANSWER:

61 kg IS THE WEIGHT OF THE 7TH STUDENT

Answer 2

Answer: The individual weights of 6 of them (in kg) are 52,54,55,53,56 and 54.

Sum of weights of 6 people = 52+54+55+53+56+54 = 324

let the weight of seventh person be x

The mean weight per student in a group of 7 students is 55 kg.

55= (324+x)/7

385 = 324+x

61 = x

Hence the weight of seventh student is 61 kg

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