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Fractions help

lizagame  May 22, 2017
 #1
avatar+91135 
+1

Probability that both are girls  =

 

We have 12/22  chances of choosing a girl on the frist draw......assuming a girl is chosen, then we have 11/21 chances of picking a girl on the second draw....so......

 

12/22   *  11/21   =

 

6/11 *   11/21     swap denominators

 

6/21   *   11 / 11  =

 

6/21   *  1  =

 

2 / 7 

 

 

 

cool  cool  cool 

CPhill  May 22, 2017

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