Question 261263
probability that all 3 are the same color?


they could be all green or they could be all black.


probability they will be all green is (4/10)^3.


probability they will be all black is (6/10)^3.


probability they will be all green or all black is (4/10)^3 + (6/10)^3.


that equals .064 + .216 = .28.