1. correct if you reduce it to 7/36
2. prob(2whites) = (2/9)(1/8) = 1/36
3. prob(2 purples) = (7/9)(6/8) = 7/12
so what do you think when comparing 1/36 with 7/12 ?
A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then a second marble is drawn.
1. What is the probability of selecting a purple marble and then a white marble?
2. What is the probability of selecting two white marbles?
3. Is there a greater chance of selecting two white marbles in a row or two purple marbles in a row?
Is this the answer: 1. Pr(p, w)=7/9*2/8
2. pr(w,w)=2/9, 1/8
3. obviously, purple then purple is greatest chance
Pr(p,p)=7/9,6/8
Pr(w,w)=2/9,1/8
1 answer