Question

There are 250 students in a school. If the number of boys in a school is 120, find the
iya in
ratio of
a number of girls to number of boys b. number of boys to total number of students
c. number of girls to total number of students
​

Answer 1

Answer:

13:12 ,  12:25,   13: 25

Step-by-step explanation:

There are total 250 students, out of which 120 are boys.

Therefore,

number of girls = total - boys

                          = 250 - 120 =  130

Hence,

(a) Required ratio = girls : boys

                             = 130 / 120

                             = 13 : 12

(b) Required ratio = boys : total

                             = 120 : 250

                             = 12 : 25

(c) Required ratio = girls : total

                             = 130 : 250

                             = 13 : 25

Answer 2

${\bf{Given\::}}$

• Total no. of students in a school is 250.

• No. of boys in the school 120.

$\\ {\bf{To\: Find\::}}$

1. The ratio of number of girls to number of boys.
2. The ratio of number of boys to total number of students.
3. The ratio of number of girls to total number of students.

$\\ {\bf{Solution\::}}$

As we know that,

$:\implies\:\rm{Total\:no.\:of\: students\:=\:(No.\:of\:boys)\:+\:(No. \:of\:girls)\:}$

$:\implies\:\rm{No. \:of\:girls\:=\:(Total\:no.\:of\: students)\:-\:(No.\:of\:boys)\:}$

$:\implies\:\rm{No. \:of\:girls\:=\:250\:-\:120\:}$

$:\implies\:\bf{No. \:of\:girls\:=\:130\:}$

❶ The ratio of number of girls to number of boys is,

➠ $\:\tt{\dfrac{130}{120}}$

➠ $\:\bf\pink{\dfrac{13}{12}}$

❷ The ratio of number of boys to total number of students is,

➠ $\:\tt{\dfrac{120}{250}}$

➠ $\:\bf\pink{\dfrac{12}{25}}$

❸ The ratio of number of girls to total number of students is,

➠ $\:\tt{\dfrac{130}{250}}$

➠ $\:\bf\pink{\dfrac{13}{25}}$