I have so much questions about using R...but i will try my best to solve myself before bothering you guys....
firstly...                            yes                         no
   male        old               130                        70
                 young            34                          48
  female     old                50                        60
                   young            79                        23

can I do a chisq.test for such contingency table?....cuz...it is not 2 dimension ....is there any other method to test the independency to the answer for the factors (male, female) (old, young) 
or you guys will suggest me to add them up and do chosq.test 2 times.. thank you...
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