Combos, Permutations, & Probability Flashcards
Combo Formula
nCk
=
Permuation Formula
nPk
=
When there are indistinguishable object in a permuation problem…
(i.e. the different arrangement of ABBCDEEF)
what is the formula?
“N” = total number of objects to be arranged
each “r!” = the frequency of each indistinguishable object
The Kumbaya circle…
how many ways can a circle of people/objects be arranged?
(K-1)!
Where “K” = total number of kumbayayers in the circle
Complementary Events
P(A) + P(A’) = 1
Possibility of event A occuring + the possibility of A’s complimentary event (A’) = 1
or P(A’) = 1 - P(A)
DISTILLED TO…
P(Anot) = 1 - P(A)
Probability Questions that Involve Combinations
of Combos w/ given restrictions
———————————————————
of Combos possible