Question

During the Computer Daze special promotion, a customer purchasing a computer and printer is given a choice of three free software packages. There are 10 different software packages from which to select. How many different groups of software packages can be selected?

Answer 1

120

Explanation:

Here there are 10 different packages in which we have to choose 3

so required number of ways
`_(3)C^(10)\textrm{}`

`_(3)C^(10)\textrm{}=(10!)/(3!7!)=(10*  9* 8)/(3* 2* 1)=120`

So there are 120 ways in which we select the different groups of software package.

so the correct answer will be 120