Page 68 - Math SL HB Sem 3

Statistics And Probabiliy

6.ll : C EVENTS.

-If E is an evcnt, the E' is the complernentary event ofE-

P(E) + P(E) =r

Erample:
An ordinary Gsided die is rolled once_Determine the chance of:
a)getting a 6
b)not getting a 6
c)getting a I or2
d)not getting a I or 2

Example:
A marble is randomly selecred fmm a box containing 5 green, 3 red and 7 blue
marbles-Determine rhe probability that the marbtc is:
a) red e) neither green nor blue
b)green f) green or red
c)blue
d)not red

l-, 4