Posted by Allison on Sunday, May 6, 2007 at 2:18pm.
Keiko has 7 colors of lanyard. She uses 3 different colors to make a keychain. How many different combinations can she choose?
7 for the first, 6 for the second and 5 for the third. The answer is the product of those numbers, no matter what order the three colors are picked. The number of possibilities in "combination" problemsa like this can written in the form
7!/(73)! = 7!/4! = 7x6x5
Write out the possibilities.
All of them.
Then count them.
Tada! Ur answer will appear.
:D

Math  Anonymous, Tuesday, April 5, 2016 at 5:18pm
28
Answer This Question
Related Questions
 Art  Drawing: girl in a southern German folk costume it's the first picture in ...
 math, bobpursly  I don't know what the 4)colors means. Models*exterior colors*...
 Art  This painting is called "Girl in a Southern German Folk Costume" 1. How ...
 math  we decided on a new logo for our brand of tshirts.It was to be 3 stripes...
 math , correction  #1 A menu offers a choice of 3 salads, 8 main dishes, and 5 ...
 math  a man buying a new car can choose among 6 different colors, 3 different ...
 Math  Sara has to buy two tops from her pocket money. She can choose two colors...
 Math  Sara has to buy two tops from her pocket money. She can choose two colors...
 Math  A popular toy for the upcoming holiday season comes in one of 6 different...
 7th grade math  Can you check this problem? Jean has 5 different colors of ...
More Related Questions