Semester 2 Test 1

Question 1

Permutation Formula

Answer 1

P(n,r) = n!/(n-r)!
n= total
r= how many items chosen

Question 2

Combination formula

Answer 2

C(n,r)= n!/r!(n-r)!
n= total
r= selected items
(n-r)! = unused items

Question 3

Probability formula

Answer 3

P(A)= favorable outcomes/total outcomes

Question 4

Odds formula

Answer 4

Successes/failures = P(A)/ 1-P(A)

Question 5

Independent events formula

Answer 5

P(AnB)=P(A)xP(B)

Question 6

Binomial probability

Answer 6

P(x=k)=(n/k)p^k(1-p)^n-k
P= probability of 1 outcome
K= successes
N=trials