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What is the probability of rolling either a 5 or 6 or 8 or 9 before rolling a 7 with two dice?
Wiki User
∙ 9y ago
Consider the three events:
A = rolling 5, 6, 8 or 9.
B = rolling 7
C = rolling any other number.
Let P be the probability of these events in one roll of a pair of dice.
Then P(A) = P(5) + P(6) + P(8) + P(9) = 18/36 = 1/2
P(B) = P(7) = 6/36 = 1/6
and P(C) = 1 - [P(A) + P(B)] = 1/3
Now P(A before B) = P(A or C followed by A before B)
= P(A) + P(C)*P(A before B)
= 1/2 + 1/3*P(A before B)
That is, P(A before B) = 1/2 + 1/3*P(A before B)
or 2/3*P(A before B) = 1/2
so that P(A before B) = 1/2*3/2 = 3/4
Wiki User
∙ 9y ago
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What is the probability of rolling a 6 on two six sided dice?
The probability of rolling a six on either (or both) die is 11/36.
Probability of rolling doubles with two dice?
The probability of rolling doubles with two dice is 1 in 6, or about 0.167.
What is the probability of rolling the number 1 when rolling two dice?
The probability is 11/36.
What is the probability of rolling an even number with 3 dice?
With one roll of three dice, the probability is 7/8.
If rolling three dice what is the probability of rolling three ones?
The probability of of rolling three ones on three dice is (1 in 6)3, or 1 in 216, or about 0.004630.
What is the probability of rolling a 6 on two six sided dice?
The probability of rolling a six on either (or both) die is 11/36.
Probability of rolling doubles with two dice?
The probability of rolling doubles with two dice is 1 in 6, or about 0.167.
What is the probability of rolling either a 6 or 4 on one roll of a dice?
The probability of rolling either a 6 or 4 on one roll of a dice is two thirds (one sixth plus one sixth because both four and six have a probability of one sixth.
When rolling a pair of dice what is the probability of rolling two?
The probability is 1/36.
What is the probability of rolling a seven on a dice?
0% probability
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The probability of rolling 12 with 2 dice is 1 in 36. The probability of not rolling 12 with 2 dice is 35 in 36.
What is the probability of rolling the number 1 when rolling two dice?
The probability is 11/36.
What is the probability of rolling a ten or more when rolling 2 dice?
The probability is 1/6.
What is the probability of rolling an even number with 3 dice?
With one roll of three dice, the probability is 7/8.
When rolling five dice what is the probability that all 5 dice will be the same number?
The probability of rolling the same number on five dice is (1/6)4, or about 0.0007716.
What is the probability of not rolling a six on a dice?
the probability is 5/6
What can effect outcomes when rolling dice?
the surface which you are rolling on, and probability.
