There were runners to start a race. In the first half of the race, of them dropped out. In the second half of the race, of the remaining runners dropped out. How many runners finished the race?
1
Expert's answer
2012-10-05T08:02:42-0400
Since we haven't exact input data, then we consider next example:
Let there were 80 runners at start. After first half 1/5 of runners dropped out. => 4/5 remained After second half 1/4 of remained runners dropped out. => 3/4 remained
So if n is number of runners who finished the race, then n=80*(4/5)*(3/4)=48
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