Math, asked by Rangar2726, 11 months ago

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.

Answers

Answered by kmohandattap62j74

61 kg is the weight of 7th person

kmohandattap62j74: Mean = sum of all observations ÷ no.of observations

kmohandattap62j74: 55=52+54+55+53+56+54+x ÷ 7

kmohandattap62j74: 385= x + 324

kmohandattap62j74: x= 385-324

kmohandattap62j74: x=61

kmohandattap62j74: therefore weight of the 7th student = 61 kgs

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Answered by wifilethbridge

Answer:

61 kg

Step-by-step explanation:

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.

$55 =\frac{\text{Sum of weights of 7 persons}}{7}$

$55 =\frac{\text{324+x}}{7}$

$55 \times 7 =324+x$

$385 =324+x$

$385-324=x$

$61=x$

Hence the weight of seventh student is 61 kg

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