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Mamont248 [21]
3 years ago
11

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

l runners started the marathon?
Mathematics
1 answer:
il63 [147K]3 years ago
7 0

Given- 90% of runner completed the marathon.

out of which 30% are man.

To proof -  let the total number of runner be y.

the men completed the marathon be 30% of the 90%.

thus we have

30% of 90% of y = 270

\frac{30}{100}×\frac{90}{100}×y = 270

now solving the above equation

we get

\\y=\frac{270\times 100\times 100}{90\times 30}

Thus solving the equation

y = 1000

Thus the total runners of men who completed marathon be 1000.

Hence proved










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