Question

A box contains 15 apples. How many different selections of 3 apples can be made sco as to include a particular apple?

Answer 1

Total number of different selections = 455

Step-by-step explanation:

Number of selections from n objects if we select r things
`=^nC_r`

Here we need to find number off selections of 3 apples from 15 apples.

Number off selections of 3 apples from 15 apples

`=^(15)C_3=(15* 14* 13)/(1* 2* 3)=455`

Total number of different selections = 455