Posted by Sabina on Monday, May 25, 2009 at 9:37am.
In exercises 1 and 2, use the following information. You randomly draw letter tiles from a bag containing the letters from the word PROBABILITIES.
1. You randomly select a B. You replace it. Then you choose a T. Tell whether the events are independent or dependent. Then find the probability that both events occur.
2. You randomly pick an I. Then without replacing the first I, you pick another I. Tell whether the events are independent or dependent. Then find the probability that both events occur.
I know that the first one is independent, and the second is dependent. But I don't get how to solve the second part. PLEASE help! Thanks..

Math  Reiny, Monday, May 25, 2009 at 10:38am
in the first, the prob of getting the B is 2/13, replacing that and then picking a T has a prob of 1/13
so the prob of picking a B, followed by the T is
(2/13)(1/13) = 2/169
in the second you are not replacing the letter so for the second prob. there are only 12 letters left
so Prob. of an I, then the second I is (3/13)(2/12) = 1/26
Answer This Question
Related Questions
 math  You randomly draw letter tiles from a bag containing the letters from the...
 8th grade Math  Khalid uses Penelope’s bag of letter tiles to create a ...
 probabilities  Jeff has a box containing 26 tiles, each with a different ...
 8th grade Math  Penelope created a game using a bag of 26 tiles, each with a ...
 math  1. There are 13 horses running in a race. In how many different ways can ...
 To Steve  Sorry here is completed question A bag contains 3 red marbles, 3 blue...
 6th grade math  Ms. Sue please check.  You write each letter of the word ...
 math  A bag contains 3 red marbles, 3 blue marbles and 3 yellow marbles. Which ...
 grade 7 mathematics  A bag contains 14 green tiles, 10 red tiles, and 16 blue ...
 Math  A bag holds tiles with the letters A, E, I, O, and U. Which list of ...
More Related Questions