Page 70 - Math SL HB Sem 3

Statistics And Probat i liry

Exnm$b:
Bag A contains 3 redand2 yellow tickets,Bag B contains I red and 4 yellow tickets-A bag is
randomly selected by tossing a coin and one ticket is removed from it-Determine the
probability that it is yellow.

Example:
A box containing f red, 2 blue and I yellow marble.By using tree diagram, find the
probability ofgetting two different colours:
a) if replacement occurs
b) if replacement does not occur-

Example:

Two discs are selected one al a time without replacement from a box containing 5 red and 3
blue discs-Find the probabiliry that:
(a) the discs are ofthe same colour_
(b) Ifthe discs are ofthe same colour, both are red-

b