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Olin [163]
3 years ago
9

there are 600 pupils in a school. the ratio of boys to girls in this school is 3:5.How many girls and how many boys are in the s

chool
Mathematics
2 answers:
a_sh-v [17]3 years ago
7 0
In order to obtain a ratio of boys to girls equal to 3:5, the number of boys has to be written as 3 x and the number of girls as 5 x where x is a common factor to the number of girls and the number of boys. The total number of boys and girls is 600. Hence 

<span>3x + 5x = 600 </span>

Solve for x 

<span>8x = 600 </span>

<span>x = 75 </span>

Number of boys 

<span>3x = 3 × 75 = 225 </span>

Number of girls 

<span>5x = 5 × 75 = 375</span>
Elodia [21]3 years ago
3 0
3x+5x=600\\&#10;8x=600\\&#10;x=75\\\\&#10;3x=3\cdot75=225\leftarrow \text{boys}\\&#10;5x=5\cdot75=375\leftarrow \text{girls}
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