Processing math: 100%
First time here? Checkout the FAQ!
x
+1 vote
343 views
asked in general by (820 points)  
You can bring along 2 friends! you have 5 friends who want to come along. How many different groups of friends could you take with you?
  

1 Answer

0 votes
answered by (820 points)  
Here the order of the r elements does not matter, so we will use combination formula:

= n!r!(nr)!

= 5!2!(52)!

= 10

Related questions

0 votes
1 answer 390 views
+2 votes
1 answer 866 views
+1 vote
0 answers 180 views
+1 vote
1 answer 312 views
+2 votes
1 answer 300 views
...