Question
3 A marathon has 8.000 , unners
domplete the race, Of those who finish
tomplete it in
under 4 hours. Of the remaining finishers.
complete it in the last hou before the time limit.
- (a) What percentage of all runners complete the race in under 4 hours?
(b) What percentage of all runners fmish in the last hour before the time limit?
under 4 hours. Of the remaining finishers.
(b) What percentage of all runners fmish in the last hour before the time limit?
Ask by Coleman George. in Australia
Mar 15,2025
Upstudy AI Solution
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Answer
(a) 56% số người hoàn thành cuộc đua dưới 4 giờ.
(b) 3.5% số người hoàn thành cuộc đua trong giờ cuối.
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Let’s break it down!
First, we know 70% of the 8,000 runners complete the marathon. So,
finishers. Of these,
finish in under 4 hours. That’s
finishers completing under 4 hours. To find the percentage of all runners, we take
.
Next, we’re told that of the remaining finishers (those not completing under 4 hours), 25% finish in the last hour before the time limit. First, find remaining finishers:
. Then,
finishers complete in the last hour. To find the percentage of all runners, we have
.
So,
- (a) 56% complete the race in under 4 hours.
- (b) 3.5% finish in the last hour before the time limit.