SOLUTION: One fateful evening, seven different fires erupt around town. The local fire station houses 21 distinct fire trucks. The fire chief is instructed to dispatch exactly three trucks t

Algebra.Com
Question 1115779: One fateful evening, seven different fires erupt around town. The local fire station houses 21 distinct fire trucks. The fire chief is instructed to dispatch exactly three trucks to fight each of the blazes. In how many ways can the trucks be dispatched ?
Answer by ikleyn(52780)   (Show Source): You can put this solution on YOUR website!
.
In  ...... =  =  ways.

=============
On Combinations,  see the lessons
    - Introduction to Combinations
    - PROOF of the formula on the number of Combinations
    - Problems on Combinations
    - OVERVIEW of lessons on Permutations and Combinations
in this site.

Also,  you have this free of charge online textbook in ALGEBRA-II in this site
    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic  "Combinatorics: Combinations and permutations".


Save the link to this textbook together with its description

Free of charge online textbook in ALGEBRA-II
https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson

into your archive and use when it is needed.


RELATED QUESTIONS

One fateful evening, seven different fires erupt around town. The local fire station... (answered by ikleyn)
City growth in the number of fires for a certain city are related by linear equation.... (answered by lwsshak3)
From a height of 50 m in his fire tower near Peace River, AB, a ranger observes two... (answered by mananth,ikleyn,MathTherapy)
Fire station A and station B are 20 miles apart. They both respond to the same fire.... (answered by drk)
two​ fire-lookout stations are 29 miles ​apart, with station B directly east of... (answered by ankor@dixie-net.com)
In Dallas, some fire trucks were painted yellow (instead of red) to heighten their... (answered by stanbon)
Two forest ranger lookout stations are 50 miles apart. A ranger in one station spots a... (answered by ikleyn)
In Dallas, some fire trucks were painted yello( instead of red) to heighten their... (answered by gonzo)
A small town has one fire engine and one ambulance available for emergencies. The... (answered by sudhanshu_kmr)