Question

the number of boys and girls in a class ratio7:5 and 8 more than girls than boys number of boys in a class?number of girls in the class?​

Answer 1

Because their ratio is given as 7 : 5. So, the strength of the class will be = number of boys in class + number of girls in class = 7x + 5x = 12x. Now, we know that it is given in the question that the number of boys is 8 more than the number of girls. So, the number of boys should be equal to 7x =7*4 = 28.

Answer 2

Question:-

• The number of boys and girls in a class ratio 7 : 5 Numbers of boys is 8 more than number of girls. What is class total strength.

To Find:-

• Find the number of girls on class.

Solution:-

• Let the number of boys be ' 7x '

• Number is girls be ' 5x '

According to the Question:-

• Number of boys are 8 more than number of girls.

$\sf \dashrightarrow \ 7x - 5x = 8$

$\sf \dashrightarrow \ 2x = 8$

$\sf \dashrightarrow \ x = \cancel\dfrac { 8 } { 2 }$

$\sf \dashrightarrow \ x = 4$

Hence ,

• Number of girls is 5x = 20.

• Number of boys if 7x = 28.