Hey can someone give me a hand with college algebra :D?

Question

jennyrlz · Answer

The _____ principle is used to find the number of strings of eight uppercase English letters that start or end with the letters BO (in that order), if letters can be repeated.

jim_thompson5910 · Answer

the answer is found here http://www.regentsprep.org/regents/math/algebra/apr1/Lcount.htm

jennyrlz · Answer

Ok thanks :) ill take a look at it ^.^

jim_thompson5910 · Answer

this page might be better because they show a tree of all possibilities http://www.mathsisfun.com/data/basic-counting-principle.html

jennyrlz · Answer

so its the counting principle?

jennyrlz · Answer

i just started learning this stuff (first week)

jennyrlz · Answer

but i get the gist of it :D

jim_thompson5910 · Answer

`so its the counting principle?`
correct

jennyrlz · Answer

Alright thanks for your time :)

jim_thompson5910 · Answer

no problem

jennyrlz · Answer

It said it was wrong :/

jennyrlz · Answer

are you sure it was counting?

jennyrlz · Answer

i have one more attempt xD

jim_thompson5910 · Answer

hmm I'm not sure if it's a typo or if it's a computer glitch. But yeah I'm pretty sure it's counting principle. Maybe they are using "multiplication" instead of "counting" ? https://onlinecourses.science.psu.edu/stat414/node/28

jim_thompson5910 · Answer

it's basically the same idea, just with a different name

jennyrlz · Answer

ok ill try multiplication ^.^

jennyrlz · Answer

whish me luck :D