Question

The mean of seven boys is 56kgs.individual weight of six boys are 52,57,55,60,59and55kg respectively.find the weight of seven boys???

Answer 1

Answer:

61 kg

Step-by-step explanation:

Given

mean weight per student in a group of 7 students if 55kg

Mean weight of 7 students=55kg

No. of students=7

∴ Mean=No. of observationssum of observations=7sum of weights of 7 students

55×7= sum of weights of 7 students

Sum of weights of 7 students=385kg

and given individual weights of 6 of them(in kg) are

52,54,53,55,56 & 54

Total weights of 6 students

=52+54+55+53+56+54

=324 kg

∴ The weight of the seventh student

=Total wieghts of 7 students− total weights of 6 students

=385−324

=61 kg.

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