Two balls are drawn in succession out of a box containing 2 red and 4 white balls. find the probability that at least 1 ball was red, given that the first ball was
(a)replaced before the second draw.
b)not replaced before the second draw

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.