Having trouble with permutations and combinations

Hoe kunnen we je helpen?

Clifford Cook

18 april 2017 20:15
Bewerkt

Shortly after being put into service, some buses manufactured by a certain company have developed cracks on the underside of the main frame. Suppose a particular city has 25 of these buses, and cracks have actually appeared in 8 of them.

a) In how many ways can a sample of 5 buses contain exactly 4 with variable cracks? The book is showing me the answer of 1190. I am lost on how they are concluding that.. If someone could help please it would be greatly appreciated.

Nieuwe post

2 opmerkingen

Clifford Cook

18 april 2017 21:03
1

Acties voor opmerkingen Permalink
Figure it out it is a tricky question and I hope my answer helps someone out in the future. The solution is 17C1 * 8C4 You have 17 buses that do not have a crack going into 1 spot and you have 8 buses that are cracked going into 4 spots you have to do the math separate and then multiply.
Domi Irocks-thatThing Versaix

22 september 2017 23:15
0

Acties voor opmerkingen Permalink
Perfect!! Thank you @Clifford Cook!!

Post is afgesloten voor opmerkingen.

Having trouble with permutations and combinations

Niet gevonden wat u zocht?

2 opmerkingen

Niet gevonden wat u zocht?