Math
posted by Allison .
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

28
Respond to this Question
Similar Questions

math , correction
#1 A menu offers a choice of 3 salads, 8 main dishes, and 5 desserts. How many different meals consisting of one salad, one main dish, and one dessert are possible? 
math, bobpursly
I don't know what the 4)colors means. Models*exterior colors*upholsterytypes*numberinteriour colors. Multiply them out. what do i have to do to solve for this one i have no idea i was low on the first try... An uto mobile manufacturerr … 
math
a man buying a new car can choose among 6 different colors, 3 different steering wheel styles, and 4 different audio packages? 
math
we decided on a new logo for our brand of tshirts.It was to be 3 stripes;(1) each stripe could be colored in 1 of 2 different colors,but we didn't want adjacent stripes to be the same color.how many different logos could we make.(2) … 
Math
A popular toy for the upcoming holiday season comes in one of 6 different colors, with one of 10 different costumes, and with one of 4 different accessory sets. A store plans to display 10% of all possible combinations. How may different … 
7th grade math
Can you check this problem? Jean has 5 different colors of markers: red, blue, green, orange, and purple. Two colors are used to make a sign. How many different combinations are possible? 
Math
Sara has to buy two tops from her pocket money. She can choose two colors from pink, red, white, and black. How many different color combinations does she can choose? 
Math
Sara has to buy two tops from her pocket money. She can choose two colors from pink, red, white, and black. How many different color combinations does she can choose? 
Art
This painting is called "Girl in a Southern German Folk Costume" 1. How did the designers of this German folk dress use the principles of art? 
Art
Drawing: girl in a southern German folk costume it's the first picture in Google search. How did the designer of the German folk dress use the principles of art?