Posted by rama on Tuesday, January 29, 2013 at 4:26pm.
A bag got mix up 6 pairs of shoes – 2 red, 2 blue, and 2 purple. Picking randomly, how many shoes must I pick before for sure that there is one matching pair in red or blue?

math  rama, Tuesday, January 29, 2013 at 9:44pm
Thank you Sue. Could you please explain.