Question

Please help?!

Answer 1

Theoretical: desired outcomes/total possible outcomes

the same as it was his first time picking before since the prevous results have no bearing on what this trial will yeild
if he didn't replace the marbles then it would be differnt



experimintal=number of event occurnces/total number of trials
so 4/4 or 100% is experimental
so

equal number of red and black and white
1/3 of the bag is black
therefor the probablity of picking a black marble is 1/3
A. 1/3 is theoretical, 4/4=experimental

B. differnce? dunno sorry

C.  4 in a row
1/3*1/3*1/3*1/3=1/81