Question

In a school, the number of boys is 9 more than thrice the

number of girls. If the total roll of class is 60. What is the
total roll of girls.​

Answer 1

`\huge\underline{\overline{\mid{\bold{\red{ANSWER}}\mid}}}`

Let the number of girls =
`x`

Then, According to the question,

number of the boys =
`9 + 3x`

Total students in class = 60, so

`9 + 3x + x = 60 \\ = > 9 + 4x = 60 \\ = > 4x = 60 - 9 \\ = > 4x = 51 \\ = > x = 51 / 4 \\ = > x = 12.75`

On rounding off

Then, number of girls = 13

Answer 2

Let the number of girls = x

Then, According to the question,

number of the boys = 9 + 3x9+3x

Total students in class = 60, so

\begin{gathered}9 + 3x + x = 60 \\ = > 9 + 4x = 60 \\ = > 4x = 60 - 9 \\ = > 4x = 51 \\ = > x = 51 \div 4 \\ = > x = 12.75\end{gathered}9+3x+x=60=>9+4x=60=>4x=60−9=>4x=51=>x=51÷4=>x=12.75

On rounding off

Then, number of girls = 13