probability questions

by Guest Sun Apr 07, 2013 2:01 pm

this arises from this post: https://such.forumotion.com/t12200-jumma-chumma#94197

now i seek my older's help in solving probability problems. i play yatzy online -- which is a dice game. what is the probability of the following (no googling please):

1) (one dice) probability of getting a 1 on first roll
2) (2 dices) probability of getting a pair?
3) (2 dices) probability of getting 2 sixes.

by MaxEntropy_Man Sun Apr 07, 2013 2:26 pm

these are very easy problems. why don't you attempt them and post your answers?

by Seva Lamberdar Sun Apr 07, 2013 2:32 pm

Since I haven't done probability type questions for a long time, let me just guess the answers, 1/6, 1/6, 1/36?

by Jeremiah Mburuburu Sun Apr 07, 2013 2:52 pm

Huzefa Kapasi wrote:this arises from this post: https://such.forumotion.com/t12200-jumma-chumma#94197

now i seek my older's help in solving probability problems. i play yatzy online -- which is a dice game. what is the probability of the following (no googling please):

1) (one dice) probability of getting a 1 on first roll
2) (2 dices) probability of getting a pair?
3) (2 dices) probability of getting 2 sixes.

"one die," not "one dice"; "two dice," not "two dices." "dice" is the plural of "die."

by Guest Mon Apr 08, 2013 12:27 am

MaxEntropy_Man wrote:these are very easy problems. why don't you attempt them and post your answers?

yes these are easy questions. i was meaning to post a few more today after these easy ones:

1) what is the probability of getting 2 of a kind in 2 consecutive rolls of dice?
2) what is the probability of getting 3 of a kind in 3 consecutive rolls of dice?
3) what is the probability of getting a 6 in three consecutive rolls of a dice?

here i failed the 3rd one.

answers are:
1) 1/6
2) 1/6 X 1/6
3) 5/6 X 5/6 X 1/6

by Guest Mon Apr 08, 2013 12:27 am

Jeremiah Mburuburu wrote:
Huzefa Kapasi wrote:this arises from this post: https://such.forumotion.com/t12200-jumma-chumma#94197

now i seek my older's help in solving probability problems. i play yatzy online -- which is a dice game. what is the probability of the following (no googling please):

1) (one dice) probability of getting a 1 on first roll
2) (2 dices) probability of getting a pair?
3) (2 dices) probability of getting 2 sixes.
"one die," not "one dice"; "two dice," not "two dices." "dice" is the plural of "die."

texas.

by Guest Mon Apr 08, 2013 12:30 am

Seva Lamberdar wrote:Since I haven't done probability type questions for a long time, let me just guess the answers, 1/6, 1/6, 1/36?

correct. surely you remember cracking the monty hall problem. Smile

by Guest Mon Apr 08, 2013 1:28 am

Huzefa Kapasi wrote:
MaxEntropy_Man wrote:these are very easy problems. why don't you attempt them and post your answers?
yes these are easy questions. i was meaning to post a few more today after these easy ones:

1) what is the probability of getting 2 of a kind in 2 consecutive rolls of dice?
2) what is the probability of getting 3 of a kind in 3 consecutive rolls of dice?
3) what is the probability of getting a 6 in three consecutive rolls of a dice?

here i failed the 3rd one.

answers are:
1) 1/6
2) 1/6 X 1/6
3) 5/6 X 5/6 X 1/6

oops. "a die" not "dice" above.

by Seva Lamberdar Mon Apr 08, 2013 5:05 am

Huzefa Kapasi wrote:

oops. "a die" not "dice" above.

Don't feel bad.

The use of plural "dice" for singular "die" is already messed up and was probably created to avoid a confusion with "dies" (as plural for die), probably because "dies" already was used in the sense of dying.

Using "dice" in the gambling game both as singular and plural, or "dice" as singular and "dices" as plural, would be more logical than using "die" as singular and "dice" as plural.

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