Maths Quiz 4

Question 1

The belief that probability for an outcome after a series of outcomes is not the same as the probability of a single outcome.

Answer 1

The gambler’s fallacy

Question 2

Events thats cannot happen together and examples

Answer 2

Mutually exclusive, eg. even and odd number when rolling a dice

Question 3

If the probability of a event is changed by another event occurring and examples

Answer 3

Dependent events, eg. seeing an umbrella, raining

Question 4

Who was the first person to understand and write about probability?

Answer 4

Gerolamo Cardano (1564)

Question 5

What type of number is pi?

Answer 5

An irrational number

Question 6

How to calculate pi?

Answer 6

circumference / diameter

Question 7

Who are the first people to used maths and what did they use it for?

Answer 7

Babylonians, Sumerians, Egyptians
Used to calculate the area and perimeter of land.

Question 8

equations for and and or

Answer 8

OR
P(A or B)=P(A) + P(B)
AND
P(A and B)=P(A) x P(B)

Question 9

Differences between frequency and probability trees

Answer 9

Frequency- event on branch, frequency on end
Probability- probability on the branch, outcome on end, event on top2

Question 10

What is conditional probability and how do you work it out?

Answer 10

The probability of event A happening, given that event B has already occurred.
P(A|B) = A and B happening / B happening

Question 11

How do you tell if an event is independent?

Answer 11

if P(A|B) = P(A) , B has no impact

Question 12

The equations for circumference and area of a circle

Answer 12

C=piD
A=piR(sqared)