Pre-calc Final

Question 1

What is the definition of probability

Answer 1

Probability= # of desired outcomes/total # of outcomes

Question 2

What is the equation for an or statement in probability

Answer 2

P(a) + P(b) - P(a&b) = P(a or b)

Question 3

What does the “c” mean in a sample set problem

Answer 3

Compliment - everything that is included in the universe but excluding the given

Question 4

What do you do for P(a&b)

Answer 4

Multiply

Question 5

What do you do for P(a or b)

Answer 5

Add

Question 6

How do you find independence

Answer 6

P(a|b) = P(a)

Question 7

What is the summation notation for a constant

Answer 7

Constant x n

Question 8

What is the summation notation formula for i

Answer 8

n(n+1)/2

Question 9

What is the summation notation formula for i^2

Answer 9

n(n+1)(2n+1)/6

Question 10

What is the summation notation formula for i^3

Answer 10

n^2(n+1)^2/4

Question 11

What is the formula for an arithmetic sequence

Answer 11

An = A1 + (n-1)d

Question 12

What is the formula for an arithmetic series

Answer 12

Sn = n/2(A1+An)

Question 13

What is the formula for a geometric sequence

Answer 13

An = A1 x r^(n-1)

Question 14

What is the sum formula for a geometric series

Answer 14

Sn = A1(1-r^n)/(1-r)

Question 15

What is the sum infinite formula

Answer 15

Sn = A1/(1-r)

Question 16

What is the formula for permutations

Answer 16

n!/(n-r)!

Question 17

What is the formula for combination

Answer 17

n!/((n-r)!r!)

Question 18

Anytime you have indistinguishable elements what formula do you use

Answer 18

n!/n1!n2!n3!…