Xercises 3 marbles are chosen at random with
replacement from a bag containing an
marbles and 6 yellow marbles.
Draw a tree diagram and use it to find
(a) the probability that 2 red marbles a
chosen

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.