Cymraeg

Answers


Using two 6-sided dice

Probability of rolling 1 = 0
Probability of rolling 2: 1⁄36 or 1 ÷ 36 × 100 = 2.78%
Probability of rolling 3: 2⁄36 = 1⁄18 or 1 ÷ 18 × 100 = 5.56%
Probability of rolling 4: 3⁄36 = 1⁄12 or 1 ÷ 12 × 100 = 8.33%
Probability of rolling 5: 4⁄36 = 1⁄9 or 1 ÷ 9 × 100 = 11.11%
Probability of rolling 6: 5⁄36 or 5 ÷ 36 × 100 = 13.89%
Probability of rolling 7: 6⁄36 = 1⁄6 or 1 ÷ 6 × 100 = 16.67%
Probability of rolling 8: 5⁄36 or 5 ÷ 36 × 100 = 13.89%
Probability of rolling 9: 4⁄36 = 1⁄9 or 1 ÷ 9 × 100 = 11.11%
Probability of rolling 10: 3⁄36 = 1⁄12 or 1 ÷ 12 × 100 = 8.33%
Probability of rolling 11: 2⁄36 = 1⁄18 or 1 ÷ 18 × 100 = 5.56%
Probability of rolling 12: 1⁄36 or 1 ÷ 36 × 100 = 2.78%

Using unusual dice


Matrix of values for the combination of a 5-sided dice and a 7-sided dice
Excel version of a d5 and d7 matrix for screen-readers


Probability of rolling 2: 1⁄35 or 1 ÷ 35 × 100 = 2.86%
Probability of rolling 3: 2⁄35 or 2 ÷ 35 × 100 = 5.71%
Probability of rolling 4: 3⁄35 or 3 ÷ 35 × 100 = 8.57%
Probability of rolling 5: 4⁄35 or 4 ÷ 35 × 100 = 11.43%
Probability of rolling 6: 5⁄35 = 1⁄7 or 1 ÷ 7 × 100 = 14.29%
Probability of rolling 7: 5⁄35 = 1⁄7 or 1 ÷ 7 × 100 = 14.29%
Probability of rolling 8: 5⁄35 = 1⁄7 or 1 ÷ 7 × 100 = 14.29%
Probability of rolling 9: 4⁄35 or 4 ÷ 35 × 100 = 11.43%
Probability of rolling 10: 3⁄35 or 3 ÷ 35 × 100 = 8.57%
Probability of rolling 11: 2⁄35 or 2 ÷ 35 × 100 = 5.71%
Probability of rolling 12: 1⁄35 or 1 ÷ 35 × 100 = 2.86%


Matrix of values for the combination of a 4-sided dice and an 8-sided dice
Excel version of a d4 and d8 matrix for screen-readers


Probability of rolling 2: 1⁄32 or 1 ÷ 32 × 100 = 3.125%
Probability of rolling 3: 2⁄32 = 1⁄16 or 1 ÷ 16 × 100 = 6.25%
Probability of rolling 4: 3⁄32 or 3 ÷ 32 × 100 = 9.375%
Probability of rolling 5: 4⁄32 = 1⁄8 or 1 ÷ 8 × 100 = 12.5%
Probability of rolling 6: 4⁄32 = 1⁄8 or 1 ÷ 8 × 100 = 12.5%
Probability of rolling 7: 4⁄32 = 1⁄8 or 1 ÷ 8 × 100 = 12.5%
Probability of rolling 8: 4⁄32 = 1⁄8 or 1 ÷ 8 × 100 = 12.5%
Probability of rolling 9: 4⁄32 = 1⁄8 or 1 ÷ 8 × 100 = 12.5%
Probability of rolling 10: 3⁄32 or 3 ÷ 32 × 100 = 9.375%
Probability of rolling 11: 2⁄32 = 1⁄16 or 1 ÷ 16 × 100 = 6.25%
Probability of rolling 12: 1⁄32 or 1 ÷ 32 × 100 = 3.125%

Using three 4-sided dice

Probability of rolling 3: 1⁄64 or 1 ÷ 64 × 100 = 1.56%
Probability of rolling 4: 3⁄64 or 3 ÷ 64 × 100 = 4.69%
Probability of rolling 5: 6⁄64 = 3⁄32 or 3 ÷ 32 × 100 = 9.375%
Probability of rolling 6: 10⁄64 = 5⁄32 or 5 ÷ 32 × 100 = 15.625%
Probability of rolling 7: 12⁄64 = 3⁄16 or 3 ÷ 16 × 100 = 18.75%
Probability of rolling 8: 12⁄64 = 3⁄16 or 3 ÷ 16 × 100 = 18.75%
Probability of rolling 9: 10⁄64 = 5⁄32 or 5 ÷ 32 × 100 = 15.625%
Probability of rolling 10: 6⁄64 = 3⁄32 or 3 ÷ 32 × 100 = 9.375%
Probability of rolling 11: 3⁄64 or 3 ÷ 64 × 100 = 4.69%
Probability of rolling 12: 1⁄64 or 1 ÷ 64 × 100 = 1.56%

Using three different dice

Probability of rolling 3: 1⁄60 or 1 ÷ 60 × 100 = 1.67%
Probability of rolling 4: 3⁄60 = 1⁄20 or 1 ÷ 20 × 100 = 5%
Probability of rolling 5: 6⁄60 = 1⁄10 or 1 ÷ 10 × 100 = 10%
Probability of rolling 6: 9⁄60 = 3⁄20 or 3 ÷ 20 × 100 = 15%
Probability of rolling 7: 11⁄60 or 11 ÷ 60 × 100 = 18.33%
Probability of rolling 8: 11⁄60 or 11 ÷ 60 × 100 = 18.33%
Probability of rolling 9: 9⁄60 = 3⁄20 or 3 ÷ 20 × 100 = 15%
Probability of rolling 10: 6⁄60 = 1⁄10 or 1 ÷ 10 × 100 = 10%
Probability of rolling 11: 3⁄60 = 1⁄20 or 1 ÷ 20 × 100 = 5%
Probability of rolling 12: 1⁄60 or 1 ÷ 60 × 100 = 1.67%