Question

Solve The Question Given In the Attachment !

Quality Answer Required !

Answer 1

Formula to use :

$Average=\frac{sum\:of\:all\:terms}{number\:of\:terms}$

$\mathfrak{\underline{\underline{ANSWERS}}}$

3.

( a )

Let the rainfall on Saturday be x .

$\frac{x+45+22+28+36+30+24}{7}=35\\\\\implies \frac{x+185}{7}=35\\\\\implies x+185=35\times 7\\\\\implies x+185=245\\\\\implies x=245-185\\\\\implies x=60$

The rainfall on Saturday was 60 mm .

( b )

Let age of Saloni be x .

$\frac{x+10+14+12}{4}=11\\\\\implies x+36=11\times 4\\\\\implies x+36=44\\\\\implies x=44-36\\\\\implies x=8$

Age of Saloni is 8 years .

4 ( a )

Let the average be x .

$75=\frac{Sum\:of\:money}{5}\\\\\implies Sum=75\times 5\\\\\implies Sum=375$

$Earning\:of\:six\:days=375+93\\\\\implies 468$

$Average =\frac{468}{6}\\\\\implies 78$

The average is Rs 78 .

4 ( b )

$70=\frac{Sum}{3}\\\\\implies Sum=70\times 3\\\\\implies Sum=210$

$Sum\:of\:4\:subjects=210+60\\\\\implies 270$

$Average=\frac{270}{4}\\\\\implies 67.5$

The average is 67.5 marks .

5 ( a )

$75=\frac{Sum}{2}\\\\\implies 75\times 2=Sum\\\\\implies Sum=150$

$Sum\:including\:Tuesday=150+x$

$\frac{150+x}{3}=80\\\\\implies 150+x=80\times 3\\\\\implies 150+x=240\\\\\implies x=240-150\\\\\implies x=90$

The income on Tuesday is Rs 90 .

5 ( b )

$\frac{Sum\:of\:both\:Rahul\:and\:Pemba}{2}=56\\\\\implies Sum=56\times 2\\\\\implies Sum=112$

Let Rupesh get x marks .

$\frac{x+112}{3}=60\\\\\implies x+112=60\times 3\\\\\implies x+112=180\\\\\implies x=180-112\\\\\implies x=68$

Rupesh got 68 marks .

Answer 2

ANSWER:---------

Age of Saloni is 8 years .

4 ( a )

Let the average be x .

75=Sumofmoney5

⟹Sum=75×5⟹Sum=375\begin{lgathered}75=\frac{Sum\:of\:money}{5}\\\\\implies Sum=75\times 5\\\\\implies

Sum=375\end{lgathered}75=5Sumofmoney⟹Sum=75×5⟹Sum=375


Earningofsixdays=375+93⟹468\begin{lgathered}Earning\:of\:six\:days=375+93\\\\\implies
468\end{lgathered}Earningofsixdays=375+93⟹468

Average=4686⟹78\begin{lgathered}Average =\frac{468}{6}\\\\\implies 78\end{lgathered}Average=6468⟹78

The average is Rs 78 .

4 ( b )

70=Sum3⟹Sum=70×3⟹Sum=210\begin{lgathered}70=\frac{Sum}{3}\\\\\implies Sum=70\times 3\\\\\implies Sum=210\end{lgathered}70=3Sum⟹Sum=70×3⟹Sum=210

Sumof4subjects=210+60⟹270\begin{lgathered}Sum\:of\:4\:subjects=210+60\\\\\implies 270\end{lgathered}Sumof4subjects=210+60⟹270

Average=2704⟹67.5\begin{lgathered}Average=\frac{270}{4}\\\\\implies 67.5\end{lgathered}Average=4270⟹67.5

The average is 67.5 marks...

hope it helps:-----------

T!—!ANKS!!!