With a fair die it is 5/6.
It is 1/2.
The probability of rolling a number on a die is 1 out of the number of sides on the die. So, for a six sided die, the probability of rolling a 4 is 1/6. The probability of rolling a 4 or a 5 becomes 2/6 or 1/3. This is because there are two acceptable outcomes out of six. So when finding the probability of rolling a number less than x on a y sided die, it becomes x-1 / y. It is x-1 because the outcome is to roll less than the number, not less than or equal.
Prob(less than 5 on a roll of a die) = 4/6 = 2/3
The probability of rolling a total of 3 or less on two dice is 3 in 36 or 1 in 12.
It is 1 (a certainty) if you roll it often enough. For a single roll of a fair die, the probability is 1/6.
It is 1/2.
1 out of 2
The probability of rolling a seven with one roll of a standard number cube is zero.
The probability of rolling a number on a die is 1 out of the number of sides on the die. So, for a six sided die, the probability of rolling a 4 is 1/6. The probability of rolling a 4 or a 5 becomes 2/6 or 1/3. This is because there are two acceptable outcomes out of six. So when finding the probability of rolling a number less than x on a y sided die, it becomes x-1 / y. It is x-1 because the outcome is to roll less than the number, not less than or equal.
The probability is zero. No number can be less than 3 and greater than 4.
Prob(less than 5 on a roll of a die) = 4/6 = 2/3
Two thirds (2/3)
The probability of rolling a total of 3 or less on two dice is 3 in 36 or 1 in 12.
It is 1 (a certainty) if you roll it often enough. For a single roll of a fair die, the probability is 1/6.
The probability is 0.
4/6 = 2/3 = 662/3%
The probability of rolling a number less than 5; which is a 4, 3, 2, or 1 is 4/6 or 2/3. The probability of tossing a head is 1/2. So, the probability of a roll less than 5 and a head is 2/3*1/2 or 1/3 or 0.333. 4/12