Question 85871
I'm not sure the other tutor's solution is correct.  If you happen to have the correct answer to this, check it out and see who is correct!!


First, just to clarify the question, you are saying find the probability that that you do NOT get both marbles green.  So, the probability of getting both marbles green would be 
P(green)*P(green)
{{{(5/20)*(5/20)=(1/4)*(1/4)=1/16}}}


Now, probability that this does NOT happen =1-P(both green)
{{{1-1/16=15/16}}}


R^3 (R^2 Retired from SCC)