90% of runners who started a marathon completed it. Of those, 30% are men. If 270 men completed the marathon, then how many total runners started the marathon?
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41
let the total be x
who finished= (x×90/100)
who where man=
(x×9/10×30/100)=270
x×9/10=270×10/3
x=900×10/9
x=1000
total runners are 1000
who finished= (x×90/100)
who where man=
(x×9/10×30/100)=270
x×9/10=270×10/3
x=900×10/9
x=1000
total runners are 1000
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