Question

if 70%of the students in a school are boys and the number of girls is 540,find the Number of boys in the school​

Answer 1

Step-by-step explanation:

70% Boys

30% Girl = 540

Total Students = 540 X 100/30 = 1800

Therefore Boys= 1800-540 = 1260

Always Remember, if there is a part or percentage given, then you must multiply the number by 100 and then divide by the pecentage.

If X%=y, then total = y times 100 / X

Hope it helps.

Answer 2

$\Large\underline\bold{Question:-}$

★If 70%of the students in a school are boys and the number of girls is 540,find the Number of boys in the school.

$\Large\underline\bold{Answer:-}$

$\large\underline\bold{Given:-}$

$\sf\ Number\:of\:Girls=540$

$\large\underline\bold{To\:Find:-}$

$\sf\ Number\:of\:boys\:in\:school$

$\large\underline\bold{Solution:-}$

$\sf\ Let\:the\:total\: number\:of\: students\:be\:X$

$\sf\ Number\:of\: girls=540$

$\sf Therefore\:the\: number\:of\:boys=X-540$

$\sf\ If\:70\:of/: students\:in\: school\:are\:boys\: then$

$\sf\ 30\: remaining\:will\:be\:girls.$

$\sf\ =30X=540$

$\sf\ =30x/100=540$

$\sf\ X=540x-100/30$

$\large\underline\bold\purple{=1800}$

$\sf\ Total\: Number\:of\: students=1800$

$\sf\ Total\: number\:of\:boys$

$\sf\ =1800-540$

$\large\underline\bold\purple{=1260}$

$\sf\ Therefore\:the\:total\: number\:of\:boys=1260.$