math
posted by Natasha on .
A bag contains 5 red balls and 7 green balls . A ball is picked at random , its color is noted and it is given out . The bag is shaken and a second selection is made. A. Draw. Tree diagram to illustrate thr information. B. Calculate the probability that both balls are red

ball is not returned...
prob(both red) = (5/12)(4/11) = 5/33