# Data Management

there is a six sided die, number 1- to 6. what is the probability that it it take exactly two tries to roll a 4? what is the expected waiting time until and odd prime number is rolled?

1. 👍 0
2. 👎 0
3. 👁 104
1. what is the probability of not getting a four on the first try and a 4 on the second.

Pr=5/6 * 1/6

odd prime number? 1,3, 5, ?

expected waiting time? Don't know, what is the time for each roll?

Prob one roll=3/6
since this is 1/2, then one should "expect" a prime number in the first roll.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Probability

Consider an experiment in which a fair four-sided die (with faces labeled 0 , 1 , 2 , 3 ) is rolled once to determine how many times a six-sided die (with faces labeled 1 ,.., 6 ) is rolled. The die rolls are independent. Let X be

asked by Kina on June 14, 2019
2. ### Acc. PreCalculus

1.A boy has 5 vests and 3 jackets. How many outfits can he wear if he wears both a vest and a jacket?How many outfits can he wear if he wears either a vest or a jacket? 2.If you roll two sided dice what is the probability of

asked by Laila on July 30, 2014
3. ### probability

Two six-sided dice each have the numbers 1 through 6 on their faces. Neither die is fair, but they are both weighted the same. The probability of rolling a certain number on one die is given in the table below: # 1 2 3 4 5 6

asked by Anonymous on March 8, 2013
4. ### math

A six-sided die (with numbers 1 through 6) and an eight-sided die (with numbers 1 through 8) are rolled. What is the probability that there is exactly one 6 showing? Express your answer as a common fraction.

asked by Anonymous on July 26, 2012
5. ### math 3

Peter is playing a game where a ten-sided die is rolled. Four sides of the die have the number 10, three sides of the die have the number 5, two sides of the die have the number 25, and one side of the die has the number 27. What

asked by kj on June 11, 2012
6. ### math 3

Peter is playing a game where a ten-sided die is rolled. Four sides of the die have the number 10, three sides of the die have the number 5, two sides of the die have the number 25, and one side of the die has the number 27. What

asked by kj on June 11, 2012
7. ### mat

Marcus flips a coin and tosses a six-sided die with the sides numbered 1 through 6. What is the probability that he gets a head on the coin and a number divisible by 3 on the die

asked by Lo on April 27, 2011
8. ### pre-algebra B

Milli tosses a coin and a six-sided die.The numbers on the die are 1 through 6. What is the probability that Milli will toss a tail and roll an odd number?

asked by Elizabeth on January 12, 2010
9. ### math

A red die and a green die have been rolled. (6 sided) What is the probability of the event? 1.The number on the red die is greater than the number on the green die (Answer is 5/12 but how?) 2. The sum is less than 10. 3. The sum

asked by Tod on May 11, 2017
10. ### math

What is the probability of rolling an odd number on a six-sided die? .5??

asked by Gigi on October 5, 2015
11. ### geometry

what is the probability of rolling a 6-sided die and getting a 4 or a number divisible by 3

asked by moe on November 25, 2016

More Similar Questions