SOLUTION: How many ways can a student select 2 electives from a possible choice of 10 electives?
Algebra.Com
Question 1191416: How many ways can a student select 2 electives from a possible choice of 10 electives?
Answer by math_tutor2020(3817) (Show Source): You can put this solution on YOUR website!
There are 10 choices for the first slot and 10-1 = 9 choices for the next.
That gives 10*9 = 90 permutations.
Since order doesn't matter, we really have 90/2 = 45 combinations.
A group like {A,B} is the same as {B,A}
Answer: 45
RELATED QUESTIONS
how many ways can a student select 2 electives from a possible choice of 10... (answered by pv=nrt15rcks)
In how many ways can a student 3 course from 8 electives and 5 core classes if elective... (answered by stanbon)
A student needs 6 more classes to complete her degree. If they are all electives, how... (answered by ikleyn)
How many different ways can a buyer select four television models from a possible choice... (answered by jorel1380)
Good Morning,
I am having trouble with this question and need to know the steps/set up... (answered by checkley77)
From a set of 12 math books, 13 science books, and 10 literature books, in how many ways... (answered by ikleyn)
how many possible ways can a student answer 10 multiple choice questions where each... (answered by mathie123)
How many possible way can you randomly select two students from a class of six... (answered by Edwin McCravy,ewatrrr)
How many possible ways can you randomly select two students from a class of six... (answered by stanbon)