Question

90% of runners who started a marathon completed it.Of those,30%are mens.If 270 mens completed the marathon,then how many total runners started the marathon

Answer 1

ANSWER
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Please refer to the attachment for the answer.....

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#BE BRAINLY

Answer 2

$\text{Let the number of runners be x } \\ \\ Marathon \ completed = 90 \% \ of \ x \\ \\ = \frac{90}{100} \times x \\ \\ = \frac{9x}{10} \\ \\ \text{Again,} \\ \\ 30\% \ of \ \frac{9x}{10} \text{are men} = 270 \\ \\ \frac{30}{100} \times \frac{9x}{10} = 270 \\ \\ \frac{27x}{100} = 270 \\ \\ x = 1000 \\ \\ Therefore, \\ \\ \textbf{Number of runners = 1000}$