Question
upstudy study bank question image url

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?

Ask by Coleman George. in Australia
Mar 15,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

(a) 56% số người hoàn thành cuộc đua dưới 4 giờ.
(b) 3.5% số người hoàn thành cuộc đua trong giờ cuối.

Solution

Sign in to Unlock Answers for Free!

A Learning Platform Trusted by Millions of Real Students and Teachers.

star-icon Unlock

Answered by UpStudy AI and reviewed by a Professional Tutor

Mind Expander

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.

Related Questions

Latest Statistics Questions

Try Premium now!
Try Premium and ask Thoth AI unlimited math questions now!
Maybe later Go Premium
Study can be a real struggle
Why not UpStudy it?
Select your plan below
Premium

You can enjoy

Start now
  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to Answer and Solution
  • Full Access to PDF Chat, UpStudy Chat, Browsing Chat
Basic

Totally free but limited

  • Limited Solution
Welcome to UpStudy!
Please sign in to continue the Thoth AI Chat journey
Continue with Email
Or continue with
By clicking “Sign in”, you agree to our Terms of Use & Privacy Policy