Skip to content
View in the app

A better way to browse. Learn more.
allnurses

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.
Discussion

NET Math Help

I've been reviewing math problems, and I'm stuck on a particular type of question. I know someone answered this question in the past few months but I can't seem to find the post anymore! Any help would be greatly appreciated--I'm feeling pretty dumb since I passed calculus but can't remember how to set up this problem!

If Sam can do a job in 4 days that takes Lisa 6 days and Tom 2 days, how long would the job take if Sam, Lisa and Tom worked together to complete it?

Please help me be one of the few who get an interview!

  • Quote

    • Featured Replies

    Don't you just calculate the average number of days? Or is that just too easy? LOL

    4 + 6 + 2 = 12

    12/3 = 4

  • Quote
    • Author

    The answer is 1.09, so it's not an average.

    I do like my coworker's answer, though. You fire Lisa because she's taking so long, and you fire Tom because he's making Sam look bad... so the answer is 4. :)

  • Quote

    oh wow, I've no idea how you came up with that answer. What is the formula?

    I like your co-worker's answer too :)

    What kind of application requires you to know that math?

  • Quote

    I don't know the formula but I would think it through if all three of them work one day then Tom can finish 1/2 (0.5) the job in one day Sam can finish 1/4th (0.25) of the job and Lisa can finish 1/6th (0.16) of the job.

    0.5

    0.25

    0.16

    0.91 or 91% of the job would be finished by all three in one day

    this leaves 0.09 or 9% of the job to be finished the next day

    There may be some kind of formula for this but if there is I have forgotten it.

  • Quote
    • Author

    tlc2u, thanks, that makes sense! It's not extra scientific but should be perfect for picking out the right multiple choice answer.

    I'm studying for the NET, and I encountered several problems like this. I only know the answer is 1.09 because that's what the answer key said. :)

  • Quote

    I googled this word problem and here is what I found.

    If you look at it this way.

    1job/6days - Lisa = 2jobs/12days

    1job/4days - Sam = 3jobs/12days

    1job/2days - Tom = 6jobs/12days

    A total of 11jobs/12days = 1job/xdays

    12*1 = 11x

    x=12/11 or 1.09days

  • Quote

    this question is not even on the NET so i wouldn't worry about this type of math.

  • Quote

    • Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.

    Guest
    Add a Comment
    Go to topic listing

    Currently Reading 0

    • No registered users viewing this page.

    Account

    Navigation

    Search

    Search

    Configure browser push notifications
    Chrome (Android)
    1. Tap the lock icon next to the address bar.
    2. Tap Permissions → Notifications.
    3. Adjust your preference.
    Chrome (Desktop)
    1. Click the padlock icon in the address bar.
    2. Select Site settings.
    3. Find Notifications and adjust your preference.