In how many ways can an investor select five mutual funds for his investment portfolio from a recommended list of seven mutual funds?

Question

rajat97 · Answer

its a problem from the topic permutation and combination
it's answer is the number of ways to select 5 objects out of 7
=7C5=21

anonymous · Answer

so it's 21? I thought it would be a little higher, what is the formula??

rajat97 · Answer

it goes like this
if you want to SELECT r no. of objects out of n no. of DISTINCT objects , you use this formula
n(superscript)C(subscript)r=n!/(n-r)!(r!)
there are many more formulas and property based on it 
i'll post a link

rajat97 · Answer

http://www.indiabix.com/aptitude/permutation-and-combination/formulas point no. 6 has the formula

rajat97 · Answer

if you wanna practice it more , i'll send you a file

anonymous · Answer

yes please

rajat97 · Answer

okaay please wait for a moment:)

rajat97 · Answer

here's the thing 
very good questions
try to solve it

rajat97 · Answer

http://www.archive.org/details/higheralgebraseq00hall this is the link to downlod the book