Is the concept here, with dependent events when we don’t mind what is in position 1 and 2 then the probability of what’s in 3 or 4 is the same as the probability of at any position i.e. choosing a red marble will be 2/5 in position 1,2 ,3 or 4?

Also im trying other concepts i.e. if it we do replace the marble and look at probability. would it still be 2/5 i.e. the events are independent ?