a) outcome - possible results of a random experiment is called its outcome .
b) set - all outcomes expressed in set .
c) trial - performence of a random experiment is called trial .
d) sample space - all possible results of an experiment is called sample space
e) event - it is occurrence of happening
for 3 childen boy = B , girl =G
sample space BBB , BBG , BGB , BGG , GBB , GBG , GGB , GGG
If order is also considered ,
probability of having 2 boys = ( favourable events ) / total events)
BBB , BBG , BGG , GGG
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