Solve the problem. how many ways can an irs auditor select 5 of 10 tax returns for an audit?

The number of ways an IRS auditor can select 5 of 10 tax returns for an audit is:

                                  252 ways

We know that the number of ways of selecting r items from a set of n items is calculated with the help of a combination formula.

i.e.

Here we are asked to find the number of ways  an IRS auditor can elect 5 of 10 tax returns for an audit.

i.e. we have: n=10 and r=5

Hence, the number of ways of doing so is:

answer is : muchas/tipicas

have a nice day!

~recklesschicken

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for