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If you roll two fair dice once what is the probability you will obtain at least one 2 or one 5?
Wiki User
∙ 14y ago
There are 6X6 or 36 different possibilities. Of these, 12 involve the first die being either a 2 or a 5 (as well as four results with either two 2s, two 5s or a 5 and a 2 (two of these, 5 on first 2 on second and 2 on first 5 on second)). With the 24 remaining rolls (where the first die is either 1,3,4 or 6), 2/6 will involve a 2 or a 5 on the second die. this gives us 8 new rolls in which the first die did not have a 2 or a 5 but the second did. So 12 + 8 gives us 20/36 or .555 cases where at least one of the rolls was either a 2 or a 5.
An alternate way to get here is to realize that we have a 2/6 chance for each die to get a 2 or a 5. If we add these probabilities together we would conclude that there is a 4/6 probability and that 24 of the rolls will be either a 2 or a 5 BUT we have actually double-counted the cases where they BOTH have a 2 or a 5 (remember those 4 cases) so if you subtract those 4, it will get you to 20 as well.
Wiki User
∙ 14y ago
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What is the probability of getting 4 of a kind if 5 identical dice are tossed simulataneously?
If they are fair dice, the probability is 0.0032If they are fair dice, the probability is 0.0032If they are fair dice, the probability is 0.0032If they are fair dice, the probability is 0.0032
What is the probability of rolling an even number with 3 dice?
With one roll of three dice, the probability is 7/8.
What is the probability of rolling a dice and getting an odd number?
The probability of getting an odd number in a single throw of a fair die (not dice!) is 1/2.The probability of getting an odd number in a single throw of a fair die (not dice!) is 1/2.The probability of getting an odd number in a single throw of a fair die (not dice!) is 1/2.The probability of getting an odd number in a single throw of a fair die (not dice!) is 1/2.
What is the probability of rolling two sixes with one throw of two dice?
If the dice are fair, then it is 1/36.If the dice are fair, then it is 1/36.If the dice are fair, then it is 1/36.If the dice are fair, then it is 1/36.
If two fair dice were rolled what is the probability of them rolling a sum of six?
If you rolled 2 fair dice, the probability of having a sum of 6 is 5 over 36
What is the probability of getting 4 of a kind if 5 identical dice are tossed simulataneously?
If they are fair dice, the probability is 0.0032If they are fair dice, the probability is 0.0032If they are fair dice, the probability is 0.0032If they are fair dice, the probability is 0.0032
What is the probability of rolling an even number with 3 dice?
With one roll of three dice, the probability is 7/8.
What is the probability of a 4 turning up at least once in a two tosses of a fair dice?
1 out of 12
What is the probability of rolling a 4 with dice?
If its a fair dice 1/6
What is the probability of rolling a dice and getting an odd number?
The probability of getting an odd number in a single throw of a fair die (not dice!) is 1/2.The probability of getting an odd number in a single throw of a fair die (not dice!) is 1/2.The probability of getting an odd number in a single throw of a fair die (not dice!) is 1/2.The probability of getting an odd number in a single throw of a fair die (not dice!) is 1/2.
What is the probability of rolling two sixes with one throw of two dice?
If the dice are fair, then it is 1/36.If the dice are fair, then it is 1/36.If the dice are fair, then it is 1/36.If the dice are fair, then it is 1/36.
What is the probability of rolling a sum of 15 on two fair dice?
Zero is the probability of rolling a sum of 15 on two fair dice; the maximum value is 12.
If two fair dice were rolled what is the probability of them rolling a sum of six?
If you rolled 2 fair dice, the probability of having a sum of 6 is 5 over 36
What is he probability that the sum of a pair of dice when rolled is six?
If the dice are fair then it is 5/36.
What is a fair dice?
A fair die is a die where the probability of throwing each of the faces is equal. Dice is two or more die's.
What is the probability you will roll a 3 and a 4 on 2 dice at the same time?
Assuming they are fair, regular dice, the probability is 1/18.
If you roll four fair dice what is the probability the sum will be an odd number?
The probability is 1/2.
