Three coins are tossed. Describe Three events which are mutually exclusive and exhaustive.
Three coins are tossed. Describe Three events which are mutually exclusive and exhaustive.
When three coins are tossed, the sample space is given by
$S =\{ HHH , \,HHT , \,HTH ,\, HTT , \,THH , \,THT , \,TTH , \,TTT \}$
Three events that are mutually exclusive and exhaustive can be
$A:$ getting no heads
$B:$ getting exactly one head
$C:$ getting at least two heads
i.e. $A=\{T T T\}$
$B =\{ HTT , \, THT, \,TTH \}$
$C =\{ HHH , \,HHT ,\, HTH , \,THH \}$
This is because $A \cap B=B \cap C$ $=C \cap A=\phi$ and $A \cup B \cup C=S$
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