Question 1182239
Given:
a. 8B, 9Y, 10R marbles.
Two marbles are drawn (with replacement)
Find P(BR)
b. 9W, 10R, 8Y marbles.
Two marbles are drawn (without replacement).
Find P(WY)
 
Solution, using the multiplication rule:
(a) total 27 marbles.
P(BR) = (8/27)*(10/27) =80/729  (with replacement)
      = 0.1097 (to four decimal places)
 
(b) total 27 marbles.
P(WY) = (9/27)*(8/26) = 4/39 (without replacement)
      = 0.1025 (to four decimal places)