Probability 2

• Math
• Secondary Education

Probability 2

How do you say THIS in English?

a caso

AT RANDOM/RANDOMLY

tirare i dadi

TO THROW  

A DIE -US(DICE -UK)/the DICE

 

TO ROLL...

ottenere un 2
(tirando un dado)

TO THROW  (A  2)

ottenere un 2
(estraendolo da un mazzo di carte)

TO DRAW  (A  2)

con rimessa

TO REPLACE

with/without replacement

RISULTATI

OUTCOMES

p= 1-p'        p+p'=1

The probability of an event occurring  is equal to 

 1 -the probability  of the event NOT occurring. 

p' is  called complementary probability

ES. raining/not raining 

Indipendent events

The first throw has no influence  on the result of the second throw

Es. All  card drawing/ ball choosing  WITH REPLACEMENT

Probability to draw two Queen cards in a row

N.B. without replacement --> NOT  indipendent

Mutually exclusive events

Events that can't happen together

ES. I throw a dice once and I get  a number less than 4

                                                                     an even number

NOT MUTUALLY exlusive:  it can be even AND less than 4