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Sagot :
total children = 420
boys = 45% of 420 = 189 boys
Girls = (100-45)% = 55% of 420 = 231 boys
boys = 45% of 420 = 189 boys
Girls = (100-45)% = 55% of 420 = 231 boys
[tex]1 \% = \frac{1}{100} \\ \\ 45 \% =\frac{45}{100}=\frac{9}{20}\\ \\ total \ children : 420 \\ \\ boys : \\ \\420 \cdot 45 \% = 420 \cdot \frac{9}{20}= 21\cdot 9 =189 \\ \\ girls : \ \\ \\ 420 -189 = 231[/tex]
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