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SCORPION-xisa [38]
3 years ago
7

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

Mathematics
2 answers:
adoni [48]3 years ago
7 0

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

SCORPION-xisa [38]3 years ago
3 0

\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 \div 4 \\  =  > x = 12.75

On rounding off

Then, number of girls = 13

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