Probability of getting atleast one 1 is close to 0.29, about 28.75% percent.
This is calculated by multiplying all the probabilities of not getting a 1 for each dice and then subtracting the answer from 1.
1 - (19/20 x 3/4)
Probability of not getting any 1 is close to 0.71, about 71.25% percent.
This is calculated by multiplying all the probabilities of not getting a 1 for each dice.
19/20 x 3/4
Probability of getting all 1's is close to 0.013, about 1.25% percent.
This is calculated by multiplying together all the probabilities of getting a 1 for each dice.
1/20 x 1/4
Probability of getting 2 1's is close to 0.013, about 1.25% percent.
This is calculated by multiplying together all the probabilities of getting a 1 for each dice that has a 1.
1/20 x 1/4
Probability of getting atleast one 4 is close to 0.29, about 28.75% percent.
This is calculated by multiplying all the probabilities of not getting a 4 for each dice and then subtracting the answer from 1.
1 - (19/20 x 3/4)
Probability of not getting any 4 is close to 0.71, about 71.25% percent.
This is calculated by multiplying all the probabilities of not getting a 4 for each dice.
19/20 x 3/4
Probability of getting all 4's is close to 0.013, about 1.25% percent.
This is calculated by multiplying together all the probabilities of getting a 4 for each dice.
1/20 x 1/4
Probability of getting 2 4's is close to 0.013, about 1.25% percent.
This is calculated by multiplying together all the probabilities of getting a 4 for each dice that has a 4.
1/20 x 1/4
Probability of getting atleast one 5 is close to 0.05, about 5% percent.
This is calculated by multiplying all the probabilities of not getting a 5 for each dice and then subtracting the answer from 1.
1 - (19/20 x 4/4)
Probability of not getting any 5 is close to 0.95, about 95% percent.
This is calculated by multiplying all the probabilities of not getting a 5 for each dice.
19/20 x 4/4
Probability of getting all 5's is close to 0., about 0.% percent.
This is calculated by multiplying together all the probabilities of getting a 5 for each dice.
1/20 x 0/4
Probability of getting 1 5's is close to 0.05, about 5% percent.
This is calculated by multiplying together all the probabilities of getting a 5 for each dice that has a 5.
1/20
Probability of getting atleast one 20 is close to 0.05, about 5% percent.
This is calculated by multiplying all the probabilities of not getting a 20 for each dice and then subtracting the answer from 1.
1 - (19/20 x 4/4)
Probability of not getting any 20 is close to 0.95, about 95% percent.
This is calculated by multiplying all the probabilities of not getting a 20 for each dice.
19/20 x 4/4
Probability of getting all 20's is close to 0., about 0.% percent.
This is calculated by multiplying together all the probabilities of getting a 20 for each dice.
1/20 x 0/4
Probability of getting 1 20's is close to 0.05, about 5% percent.
This is calculated by multiplying together all the probabilities of getting a 20 for each dice that has a 20.
1/20
Probability of getting all the maximum faces (a 20 and a 4) is close to 0.013, about 1.25% percent.
This is calculated by multiplying together all the probabilities of getting the maximum face for each dice.
1/20 x 1/4
Probability of getting one of a kind is close to 0.05, about 5% percent.
There are 4 ways to get one of a kind (all 1's, all 2's, all 3's or all 4's). The probability of getting all of any kind is then caclulated by adding the probability of getting all 1's, all 2's, all 3's or all 4's. Since, probabilities of getting all 1's through all 4's are the same, we can multiply them all together. So, multiplying the probability of getting all 1's by 4 will give us the probability of getting all of any kind.
4 x (1/20 x 1/4)
// define the sets of dice to use // 1 set for each kind of dice var dice_sets = [ [1, 20], // 1d20 [1, 4], // 1d4 ]; var this_roll = []; // array to store the results of this roll for (var ds = 0; ds < dice_sets.length; ds++) { //loop through each dice set // for each dice set, determine the numbers of dice, lowest and highest side of the dice var numbers_of_dice = dice_sets[ds][0]; // how many dice to roll var lowest = 1; // lowest possible side of the dice var highest = dice_sets[ds][1]; // highest possible side of the dice for (var j = 1; j <= numbers_of_dice; j++) { // loop for the number of dice // for each dice, generate a number between lowest and highest var dice_face = Math.floor(Math.random() * (highest-lowest+1) + lowest); this_roll.push(dice_face); //store this in the array } } // print all the generated rolls for (j = 0; j < this_roll.length; j++) { // loop through the inner dice array //print each dice roll value followed by a space document.write(this_roll[j]); document.write(" "); } /* Sample output */