2 years ago

يجوز الاسراف فقط في التجهيز للعبادات

2 answers:

8 0

يجوز الاسراف فقط في التجهيز للعبادات

It is permissible only to be extravagant in preparing for worship

أنا لا أفهم.

ollegr [7]2 years ago

6 0

Answer:

It is permissible only to be extravagant in preparing for worship

Explanation:

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Finding the new mean is simple: If $E[X]=10$ , then $E[2X]=2E[X]=20$ .

Meanwhile, the standard deviation is the square root of the variance, which is given by

$V[X]=E[X^2]-E[X]^2\implies V[2X]=E[(2X)^2]-E[2X]^2=4E[X^2]-(2E[X])^2$

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