The average weight of 45 students in a class | vedclass

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Question

(A) Initial sum of weights $= 45 	imes 36 = 1620 \, kg$.Correction for the first student: Actual weight is $32 \, kg$,calculated weight is $34 \, kg$

Vedclass · Accepted Answer

$36.07$

Vedclass · Answer

(A) Initial sum of weights $= 45 	imes 36 = 1620 \, kg$.Correction for the first student: Actual weight is $32 \, kg$,calculated weight is $34 \, kg$. Difference $= 32 - 34 = -2 \, kg$.Correction for the second student: Actual weight is $45 \, kg$,calculated weight is $40 \, kg$. Difference $= 45 - 40 = +5 \, kg$.Total change in sum $= -2 + 5 = +3 \, kg$.Actual sum of weights $= 1620 + 3 = 1623 \, kg$.Actual average weight $= \frac{1623}{45} = 36.0666... \, kg$.Rounding to two decimal places,we get $36.07 \, kg$.

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