Question

please solve the question fast ​

Answer 1

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ANSWER :-

${\boxed{\begin{array}{| c | c| c |}\sf{30} & \sf{7} &\sf{30} \times 7 = \underline{210}\\{}\sf45 &\sf2 &\sf45 \times 2 = \underline{90}\\{}\sf60 &\sf8 &\sf60 \times 8= \underline{480} \\{\sf75}& \sf5& \sf75 \times 5 = \underline{375} \\ \sf90&\sf3&\sf90 \times 3 = \underline{270} \\ \: &\\&\: \sf{N=25}& \sf{Σf{}^{i} x{}^{i}} = \underline{1425}\end{array}}}$

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EXPANATION :-

• 2 families use 45 units electricity.

• The score with a frequency of 5 is 75.

• N = 25, and Σf'x' = 1425

• SO,

• $\boxed{ \sf{Mean= \huge \frac{Σf {}^{i}x {}^{i} }{N} = \frac{ \cancel{1425}}{ \cancel{25}} }}$

• $\implies \huge \boxed{ \sf= 54}$

$\therefore \sf{So\:the\:mean\:of\:electricity\:used\:by} \\ \sf{ \:each\:family\:in\:the\:month \:of\:May\:is\:57.}$

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Answer 2

Answer:

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ANSWER :-

\begin{lgathered}{\boxed{\begin{array}{| c | c| c |}\sf{30} & \sf{7} &\sf{30} \times 7 = \underline{210}\\{}\sf45 &\sf2 &\sf45 \times 2 = \underline{90}\\{}\sf60 &\sf8 &\sf60 \times 8= \underline{480} \\{\sf75}& \sf5& \sf75 \times 5 = \underline{375} \\ \sf90&\sf3&\sf90 \times 3 = \underline{270} \\ \: &\\&\: \sf{N=25}& \sf{Σf{}^{i} x{}^{i}} = \underline{1425}\end{array}}}\end{lgathered}304560759072853N=2530×7=21045×2=9060×8=48075×5=37590×3=270Σfixi=1425

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EXPANATION :-

2 families use 45 units electricity.

The score with a frequency of 5 is 75.

N = 25, and Σf'x' = 1425

SO,

\boxed{ \sf{Mean= \huge \frac{Σf {}^{i}x {}^{i} }{N} = \frac{ \cancel{1425}}{ \cancel{25}} }}Mean=NΣfixi=251425

\implies \huge \boxed{ \sf= 54}⟹=54

\begin{lgathered}\therefore \sf{So\:the\:mean\:of\:electricity\:used\:by} \\ \sf{ \:each\:family\:in\:the\:month \:of\:May\:is\:57.}\end{lgathered}∴SothemeanofelectricityusedbyeachfamilyinthemonthofMayis57.

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