One of two cubical dice has a blank rather than one dot. The other has a blank face rather than four dots. What is the probability that a sum of seven appears when the dice are thrown?
2006-11-02 08:06:57 · 9 answers · asked by Felicia F 1 in Education & Reference ➔ Trivia
one in six
2006-11-02 08:10:28 · answer #1 · answered by Anonymous · 0⤊ 0⤋
If that so, the first die will have just 4 numbers to use for the sum of 7 and the other has only 4 to use.
because the number 1 for the first die cant be used,
we will proceed to the second number 2 which can be matched with number 5 of the second die.
Then number 4 of the first die to be matched with number 3 of the second die.
Since only number 4 cant be used for the second die, we will use the number 5 of the first die which can be matched with number 2 of the second die.
and at last, we will use the number 6 of the first die which can be matched with the number 1 of the second die.
we cant use 6 of the second die to matched with 1 of the first die
because the number 1 of the first die is replaced by a blank.
Henceforth, we have paired 4 matches with the sum of seven:
( 2 , 5 ) ( 4 , 3 ) ( 5 , 2 ) ( 6 , 1 )
then, the total outcome would be: 6 * 6 = 36
so, the probability that is seven in that case is
Pr ( sum is 7 ) = 4/36 = 1/9
2006-11-06 08:38:05 · answer #2 · answered by jdash01 3 · 0⤊ 0⤋
there are 36 different combos for 2 dice. A seven can appear 6/36 times or 1 out of every 6 rolls. If you take the number 1 off of the first die and a four off the other, you reduce the probability down to 4/36 or 1 out of every 9 rolls.
2006-11-02 19:15:28 · answer #3 · answered by jess_offramp 3 · 0⤊ 0⤋
There are 36 different sums of two dices. To get sum of 7, here is all the possibilities
dice 1 : dice 2
2 : 5
4 : 3
6 : 1
5 : 2
Ans: 4/36 = 1/12
2006-11-03 01:50:33 · answer #4 · answered by karzi 2 · 0⤊ 0⤋
the propibility that a sum of seven appears when the dice are thrown is 4/12 or simplified it's 1/3! is that right?
2006-11-02 16:15:17 · answer #5 · answered by campkid4ever 2 · 0⤊ 0⤋
There is only one way you could get this and that is 2,5 and its reverse 5, 2 which means that out of the 36 possible answers there are two so the answer to your question is 2/36 or 1/18... hope this was helpful
PS please award best answer
Surprising to see 6 wrong answers
2006-11-02 23:08:45 · answer #6 · answered by WhizMaster 4 · 0⤊ 0⤋
i hate probabaility.i woundt wanna give u the wrong answer so i aint gonna answer.lol
2006-11-02 16:25:43 · answer #7 · answered by *~Love?~* 3 · 0⤊ 0⤋
34/100 thats what it will be!
2006-11-02 16:09:17 · answer #8 · answered by ♥22♥im in love with this guy. 1 · 0⤊ 0⤋
my brain is hurting..sorry no idea
2006-11-02 17:08:13 · answer #9 · answered by Sunseaandair 4 · 0⤊ 0⤋