English
Hindi
13.Statistics
easy

જો $x_i $ નું પ્રમાણિત વિચલન $10$  હોય તો ($50 + 5x_i$)નું વિચરણ કેટલું હશે ?

A

$50$

B

$250$

C

$500$

D

$2500$

Solution

We know, $\operatorname{Var}( aX + b )= a ^2 \cdot Var ( x )$

Here $a=5, b=50$

$\therefore$ Required variance $=\operatorname{Var}(5 x +50)=5^2 \cdot V$ ar $( x )=25 \times \sigma^2=25 \times 10^2=2500$

Standard 11
Mathematics

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