Ask Experts Questions for FREE Help !
Ask
    latasha johnson's Avatar
    latasha johnson Posts: 7, Reputation: 1
    New Member
     
    #1

    Jan 22, 2009, 08:43 AM
    I think this is a riddle.
    Five people want a photographer to take pictures of every possible group of three of them.
    How many different photos will the photographer need to take?:confused:
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
     
    #2

    Jan 22, 2009, 09:03 AM
    C(5,3)
    latasha johnson's Avatar
    latasha johnson Posts: 7, Reputation: 1
    New Member
     
    #3

    Jan 22, 2009, 12:02 PM
    Math, riddle
    Five people want a photographer to take pictures of every possible group of three of them. How many pictures will the photographer need to take?
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
    Ultra Member
     
    #4

    Jan 22, 2009, 12:06 PM
    This is not a riddle. It is just wanting to know how many ways you can choose 3 items from 5.

    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
    Ultra Member
     
    #5

    Jan 22, 2009, 12:17 PM
    Do you know this notation? Factorials ans so forth. Do you have a calculator? Most of them will quickly do it.
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
     
    #6

    Jan 22, 2009, 01:13 PM

    You can do it yourself by going through all the combinations logically too, the answer is not large!
    latasha johnson's Avatar
    latasha johnson Posts: 7, Reputation: 1
    New Member
     
    #7

    Jan 22, 2009, 01:32 PM
    Quote Originally Posted by galactus View Post
    This is not a riddle. It is just wanting to know how many ways you can choose 3 items from 5.

    can you show me how to do this step by step?:confused:
    latasha johnson's Avatar
    latasha johnson Posts: 7, Reputation: 1
    New Member
     
    #8

    Jan 22, 2009, 01:36 PM
    Quote Originally Posted by Capuchin View Post
    you can do it yourself by going through all the combinations logically too, the answer is not large!
    I still don't understand can you show me step by step please!:confused:
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
     
    #9

    Jan 22, 2009, 02:54 PM

    5! = 5x4x3x2x1, so expanding galactus' answer:

    latasha johnson's Avatar
    latasha johnson Posts: 7, Reputation: 1
    New Member
     
    #10

    Jan 22, 2009, 10:58 PM
    Quote Originally Posted by Capuchin View Post
    5! = 5x4x3x2x1, so expanding galactus' answer:

    is the answer a total of 10:confused:
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
     
    #11

    Jan 23, 2009, 12:56 AM

    Yes
    latasha johnson's Avatar
    latasha johnson Posts: 7, Reputation: 1
    New Member
     
    #12

    Jan 23, 2009, 08:51 AM
    Quote Originally Posted by Capuchin View Post
    yes
    thank tou:)
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
     
    #13

    Jan 23, 2009, 09:45 AM

    You can also check by working out all the possible combinations yourself:

    The first is obviously

    123

    Then you change the last digit until you run out

    124
    125

    Now you change the 2nd digit and repeat

    134
    135

    And again

    145

    Now you've run out of second digits so change the first:

    234
    235

    Now change the second digit again:

    245

    Now the first again

    345

    Now we've found them all! Count them up and there's 10 :)
    latasha johnson's Avatar
    latasha johnson Posts: 7, Reputation: 1
    New Member
     
    #14

    Jan 23, 2009, 12:03 PM
    Quote Originally Posted by latasha johnson View Post
    thank tou:)
    thank you, you have been of great help! :)

Not your question? Ask your question View similar questions

 

Question Tools Search this Question
Search this Question:

Advanced Search


Check out some similar questions!

Riddle me this. Someone has to know this one! [ 36 Answers ]

Okay --- I have been bet that I cannot find the answer to this riddle... I need you all's help! Here it goes: WHAT IS ALWAYS TALKING WITH NOTHING TOSAY,SILVER AND ROUND ON BOTH ENDS,AND YOUR BEST FRIEND WHEN THE LIGHTS GO OUT?? My first guess was -- battery --- eh, I was wrong... ...

Riddle me this [ 5 Answers ]

If there are 5 ladies and 5 apples in a basket, and all the ladies take one apple, how could one apple still be left in the basket? Can someone help with this riddle

Here is a riddle for yeah! [ 10 Answers ]

What is greater than God, More evil than the devil, The poor have it, The rich need it, And if you eat it, you'll die? It took me awhile to figure this one out but it made sense after I did. When asked this riddle, 80% of kindergarten kids got the answer, compared to 17% of Stanford...

Riddle me this [ 1 Answers ]

I am the sum of all my parts, yet equal to none of them. The answer has two words and this is a number riddle

Riddle [ 1 Answers ]

Twice eight are ten of us, yet ten is just three. Seven of us are five. Can you now see? If this is not enough, I will tell you a bit more, Nineteen of us are eight, and nine is just four.


View more questions Search