Ask Experts Questions for FREE Help !
Ask
    nzavala's Avatar
    nzavala Posts: 12, Reputation: 2
    New Member
     
    #1

    Oct 14, 2007, 05:00 PM
    Finding the missing number when the average is known
    I need to know if there is an easier way to solving this problem.

    Three homes on Lavender Lane recently sold for an average price of $89,000. Two of the homes sold for $95,000 each. What is the price of the third home?

    Answer: I know that $95,000 + $95,000= $190,000

    If I use random numbers between $76,000 to $80,000, I'm going to narrow my answer to $77,000. By adding $95,000 + $95,000 + $77,000 = $267,000

    Then I divide $267,000/3= $89,000. So third home costs $89,000.

    Is there a better way to solving these types of problems? My way takes too long to solve.

    Any ideas are welcome.
    cool_dude's Avatar
    cool_dude Posts: 124, Reputation: 9
    Junior Member
     
    #2

    Oct 14, 2007, 06:25 PM
    off course there's a better way then guess and check. Make an equation. (2(95000) + x)/3 = 89000 now just solve for x which is the price of the third house
    InfoJunkie4Life's Avatar
    InfoJunkie4Life Posts: 1,409, Reputation: 81
    Ultra Member
     
    #3

    Aug 19, 2010, 01:16 PM

    You know that the average is 89000. If there were 3 numbers then you know the big number was divided by 3 to get 89000. So if you take 89000 and multiply it by 3, you can subtract what numbers you know to determine the remaining number.

    (Basically the same thing proposed above)

Not your question? Ask your question View similar questions

 

Question Tools Search this Question
Search this Question:

Advanced Search


Check out some similar questions!

Finding the next number in series [ 4 Answers ]

Which Number should come next: 8,-7,-22,-37, The options given as answers are: 1. 191 2. 291 3. 141 4. 1910 I would think the answer...

Excel: finding duplicate ID number [ 4 Answers ]

Hi, I would like to find / list any duplicated numberID in my spreadsheet, can you guys please help me. For example: Name IDnumber State Product1 0001 NJ Product2 0002 NY Product1 0001 ...

What is the best methods of finding a missing person [ 1 Answers ]

I want to know what are the best ways of finding a misssing person when the police fail please I would appreciate any info thank you

Trobble finding a missing partition after formating [ 4 Answers ]

Hi My friend has formatted her toshiba laptop using the CD. She has windows prof home addition. After formatting she couldn't find the D partition and there was onely the C partition. Is there any way to find the D partition and if so how? It's very important that she finds it because she...


View more questions Search