# Differences

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 probability:02_multiple_event_probability [2014/03/06 13:16]anna [2.2. Mutually non exclusive events] probability:02_multiple_event_probability [2014/03/06 13:22] (current)anna [2.4. Additional exercises] Both sides previous revision Previous revision 2014/03/06 13:22 anna [2.4. Additional exercises] 2014/03/06 13:16 anna [2.2. Mutually non exclusive events] 2014/01/20 15:55 marje 2014/01/20 15:44 marje [2.3. Independent events] 2014/01/20 13:48 marje [2.2. Mutually non exclusive events] 2014/01/16 15:07 marje created 2014/03/06 13:22 anna [2.4. Additional exercises] 2014/03/06 13:16 anna [2.2. Mutually non exclusive events] 2014/01/20 15:55 marje 2014/01/20 15:44 marje [2.3. Independent events] 2014/01/20 13:48 marje [2.2. Mutually non exclusive events] 2014/01/16 15:07 marje created Line 400: Line 400: ++Answer| Note, that $\text{"​my new friend is female"​}=$\\ ++Answer| Note, that $\text{"​my new friend is female"​}=$\\ $\text{"​my new friend is female and at most$29$years"​}\cup$\text{"​my new friend is female and at most $29$ years"​}\cup - \text{"​my new friend is female and at least $30$ years"​}$,​ and the events ​ + \text{"​my new friend is female and at least$30$years"​}$,​ and these events ​ are mutually exclusive. ​ - $\text{"​my new friend is female and at most$29$years"​}$ and + Thus, $\text{Pr}[\text{"​my new friend is female"​}]=0,​1+0,​3=0,​4$.++ - $\text{"​my new friend is female and at least$30$years"​}$ ​are mutually exclusive. Thus, + - $\text{Pr}[\text{"​my new friend is female"​}]=0,​1+0,​3=0,​4$.++ +