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14.Probability
easy
Three coins are tossed. Describe Two events which are mutually exclusive but not exhaustive.
Option A
Option B
Option C
Option D
Solution
When three coins are tossed, the sample space is given by
$S =\{ HHH , \,HHT , \,HTH ,\, HTT , \,THH , \,THT , \,TTH , \,TTT \}$
Two events which are mutually exclusive but not exhaustive can be
$A:$ getting exactly one head
$B:$ getting exactly one tail
i.e.. $A=\{H T T, \,T H T, \,T T H\}$
$B =\{ HHT ,\, HTH , \,THH \}$
This is because $A \cap B=\phi,$ but $A \cup B \neq S$
Standard 11
Mathematics
