The mean weight of $36$ students is $41 k g .$ If one of the students leave the class then mean is decreased by $200 g .$ Find the weight of the student who left .

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Solution

$\frac{α_{1} + α_{2} . . . + α_{36}}{36} = 41 k g$

$\frac{α_{1} + α_{2} + . . . + α 35}{35} = 41 - 0.2 = 40.8$

$α_{1} + α_{2} + . . . + α_{35} = 1428.$

$α_{1} + α_{2} + . . . + α_{35} + α_{36} = 1476.$

$∴ α_{36} = 1476 - 1428 = 48 k g$

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The mean weight of 36 students is 41kg. If one of the students leave the class then mean is decreased by 200g. Find the weight of the student who left .

α1+α2...+α3636=41kgα1+α2+...+α3535=41−0.2=40.8α1+α2+...+α35=1428.α1+α2+...+α35+α36=1476.∴α36=1476−1428=48kg

The mean weight of $36$ students is $41 k g .$ If one of the students leave the class then mean is decreased by $200 g .$ Find the weight of the student who left .

$\frac{α_{1} + α_{2} . . . + α_{36}}{36} = 41 k g$

$\frac{α_{1} + α_{2} + . . . + α 35}{35} = 41 - 0.2 = 40.8$

$α_{1} + α_{2} + . . . + α_{35} = 1428.$

$α_{1} + α_{2} + . . . + α_{35} + α_{36} = 1476.$

$∴ α_{36} = 1476 - 1428 = 48 k g$