Compute the permutation. 8 p 4 32 1,680 6,720

ANSWER

EXPLANATION

The given permutation is

Recall the formula for permutation

We substitute n=8, and r=4 to obtain:

Recall the factorial expansion

We apply this expansion to get:

it could 14.28 but if its not that one then it has to be the 17 one. hope this ! : )

step-by-step explanation:

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: