Question 1033663
===8/14 red===========6/14 black
4/7 red====3/7 black  ===4/7 red=====3/7 black
Probability of both black marbles is (3/7)(3/7)=9/49
probability of one black marble is (8/14)(3/7)+(6/14)(4/7)=24/49
probability of zero black marbles is (8/14)(4/7)=16/49