Question

Pls help fast:

How many ways can 3 songs be chosen from 12 to create a 3 song ordered play list?​

Answer 1

1320

Explanation:

Total number of songs = 12

Number of songs required to arrange in a play list = 3

It means we have to arrange 3 songs from 12 in the play lines. So, required number of ways is

`Ways=^(12)P_(3)`

`Ways=(12!)/((12-3)!)`
`[\because ^nP_r=(n!)/((n-r)!)]`

`Ways=(12* 11* 10* 9!)/(9!)`

`Ways=1320`

Therefore, the required number of ways is 1320.