In a class percentage of girls is 40%. If there are 30 boys then numbe

1.	In a class percentage of girls is 40%. If there are 30 boys then number of girls is
Answer» $\sf{\bold{\green{\underline{\underline{Given}}}}}$ % of girls = 40% No. of boys = 30 ______________________ $\sf{\bold{\green{\underline{\underline{To\:Find}}}}}$ No. of girls = ?? ______________________ $\sf{\bold{\green{\underline{\underline{Solution}}}}}$ ⠀⠀⠀⠀ Total percentage = 100% ⠀⠀ % of girls = 40% ⠀⠀⠀⠀ % of boys = Total - %age of girls ⠀⠀⠀⠀ % of boys = 100 - 40 ⠀⠀⠀⠀ % of boys = 60% ⠀⠀⠀⠀ let the total number of students be X ⠀⠀⠀⠀ $\sf:\implies \: {\bold{ <klux>60</klux>\% of x = 30}}$ ⠀⠀⠀⠀ $\sf:\implies \: {\bold{ \dfrac{60}{<klux>100</klux>} \times x = 30}}$ ⠀⠀⠀⠀ $\sf:\implies \: {\bold{ \dfrac{6}{10} \times x = 30}}$ ⠀⠀⠀⠀ $\sf:\implies \: {\bold{ x =\dfrac{30\times 10}{6}}}$ ⠀⠀⠀⠀ $\sf:\implies \: {\bold{ x = 5\times 10}}$ ⠀⠀⠀⠀ $\sf:\implies \: {\bold{ x = 50}}$ ⠀⠀⠀⠀ Total number of students = 50 ⠀⠀⠀⠀ No. of girls = Total students - No. of boys ⠀⠀⠀⠀ No. of girls = 50 - 30 ⠀⠀⠀⠀ No. of girls = 20 ______________________ $\sf{\bold{\green{\underline{\underline{Answer}}}}}$ Total number of girls in the class are 20

In a class percentage of girls is 40%. If there are 30 boys then number of girls is

Answer»

$\sf{\bold{\green{\underline{\underline{Given}}}}}$

% of girls = 40%
No. of boys = 30

______________________

$\sf{\bold{\green{\underline{\underline{To\:Find}}}}}$

No. of girls = ??

______________________

$\sf{\bold{\green{\underline{\underline{Solution}}}}}$

⠀⠀⠀⠀

Total percentage = 100%

⠀⠀

% of girls = 40%

⠀⠀⠀⠀

% of boys = Total - %age of girls

⠀⠀⠀⠀

% of boys = 100 - 40

⠀⠀⠀⠀

% of boys = 60%

⠀⠀⠀⠀

let the total number of students be X

⠀⠀⠀⠀

$\sf:\implies \: {\bold{ <klux>60</klux>\% of x = 30}}$

⠀⠀⠀⠀

$\sf:\implies \: {\bold{ \dfrac{60}{<klux>100</klux>} \times x = 30}}$

⠀⠀⠀⠀

$\sf:\implies \: {\bold{ \dfrac{6}{10} \times x = 30}}$

⠀⠀⠀⠀

$\sf:\implies \: {\bold{ x =\dfrac{30\times 10}{6}}}$

⠀⠀⠀⠀

$\sf:\implies \: {\bold{ x = 5\times 10}}$

⠀⠀⠀⠀

$\sf:\implies \: {\bold{ x = 50}}$

⠀⠀⠀⠀

Total number of students = 50

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No. of girls = Total students - No. of boys

⠀⠀⠀⠀

No. of girls = 50 - 30

⠀⠀⠀⠀

No. of girls = 20

______________________

$\sf{\bold{\green{\underline{\underline{Answer}}}}}$

Total number of girls in the class are 20