Question

Find the mean of the following marks obtained by students of a class. Marks 15 20 25 30 35 40 a No. of students 9 7 12 14 15 6​

Answer 1

$\begin{gathered} \\ {\underline{\rule{200pt}{3pt}}} \end{gathered}$

${\huge{\underline{\color{red}{\rm{Question}}}}}$

Find the mean of the following marks obtained by students of a class. Marks 15 20 25 30 35 40 a No. of students 9 7 12 14 15 6

$\begin{gathered} \\ {\underline{\rule{200pt}{3pt}}} \end{gathered}$

${\huge{\underline{\color{green}{\rm{Required\:Answer}}}}}$

27.5

$\begin{gathered} \\ {\underline{\rule{200pt}{3pt}}} \end{gathered}$

${\large{\underline{\sf{Ascending\:order\:of\:given\:marks}}}}$

${\large{\underline{\underline{\color{orange}{\sf{Given}}}}}}$

${\large{\sf{Marks-15,20,25,30,35,40}}}$

${\large{\sf{Number\:of\:Students-9,7,12,14,15,6}}}$

${\large{\underline{\underline{\sf{To\:Find}}}}}$

${\large{\sf{Mean\:of\:marks\:obtained\:by\:Students\:in\:Class}}}$

${\large{\underline{\sf{Ascending\:order\:of\:given\:marks}}}}$

${\large{\sf{15,20,25,30,35,40}}}$

$\begin{gathered} \\ {\underline{\rule{200pt}{3pt}}} \end{gathered}$

${\large{\underline{\underline{\color{purple}{\sf{Formula\:Using}}}}}}$

${\large{\boxed{\color{red}{\sf{\frac{sum\:of\:all\:observations}{number\:of\:all\:observations}=m}}}}}$

${\large{\underline{\underline{\sf{Here}}}}}$

${\large{\sf{m=mean}}}$

$\begin{gathered} \\ {\underline{\rule{200pt}{3pt}}} \end{gathered}$

$\begin{gathered} \\ \qquad{\rule{150pt}{1pt}} \end{gathered}$

${\qquad{\qquad{\qquad{\large{\underline{\underline{\color{blue}{\sf{Solution}}}}}}}}}$

${\qquad{\qquad{\quad{\large{\boxed{\sf{\frac{sum\:of\:all\:observations}{number\:of\:all\:observations}=m}}}}}}}$

${\qquad{\qquad{\quad{\LARGE{\sf{\frac{15+20+25+30+35+40}{6}}}}}}}$

${\qquad{\qquad{\quad{\LARGE{\sf{\frac{165}{6}}}}}}}$

${\qquad{\qquad{\quad{\large{\sf{\longmapsto 27.5}}}}}}$

$\begin{gathered} \\ \qquad{\rule{150pt}{1pt}} \end{gathered}$

$\begin{gathered} \\ {\underline{\rule{200pt}{3pt}}} \end{gathered}$

${\large{\boxed{\color{green}{\sf{\bigstar The\:mean\:of\:the\:given\:marks\:is=27.5}}}}}$

$\begin{gathered} \\ {\underline{\rule{200pt}{3pt}}} \end{gathered}$

${\qquad{\qquad{\qquad{\qquad{\qquad{\qquad{\scriptsize{\sf{@BrainlyResearcher}}}}}}}}}$

Answer 2

27.94

m=marks/no.of students

or

15+20+25+30+35+40=165/5

=27.5