Question

Help me with this question please

Answer 1

Answer: 56

To solve this problem, we will use the formula for Combination which goes by

`_{}C(n,r)=^nC_r=_nC_r=(n!)/(r!(n-r)!)`

From the problem, we know that:

n = 8

r = 3

Since there are a total of 8 different movie soundtracks and we only need 3.

Substituting it on the formula,

`C(n,r)=(n!)/(r!(n-r)!)`
`C(8,3)=(8!)/(3!(8-3)!)`
`C(8,3)=56`

Therefore, there are 56 possible selections of movie soundtracks at the music store.