Question

the mean of 5 observation is 50. one of the observation was removed from the data, hence the mean became 45.fin the observation which was removed.​

Answer 1

$\huge{\underline{\underline{\mathfrak\red{Question\::}}}}$

the mean of 5 observation is 50. one of the observation was removed from the data, hence the mean became 45.find the observation which was removed.

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CASE .I)

GIVEN,

MEAN(x)=50

observation($\epsilon$xi)=5

[FORMULA:-]

$x(mean)= \frac{\epsilon \: xi}{n} \\ 5 = \frac{\epsilon \: xi}{50} \\ .°.\epsilon \: xi = 250..........(1)$

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CASE. II)

GIVEN,

one of the observation was removed from the data.

.°.5-1=4

.°.observation=4

mean=45.

[FORMULA:-]

x(mean)=$\epsilon$xi /n

45=$\epsilon$xi /4

.°.$\epsilon$xi =45×4

.°.$\epsilon$xi =180..........(2)

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FROM EQ. 1 & 2.

THE observation is = 250-180

.°.The observation is 70.

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Answer 2

Hey!

✔✔Refer to the attachment please