Question

What is the probability
of getting sum of the face values of 4 dices equal to 21?​

Answer 1

The sum of a die is 21, and four dice sum up to 84, which equals 10 with probability 0.

Unless the dice are not standard six-sided dice. Then it depends on what dice we have in our collection. For example, in our collection, I think we only have dice were numbers sum to >10, 10, 6, 4.5, 0.45, maybe 0.045 and 0.0045 (excluding dice with no numbers on them). It is impossible to pick four dice which sum to exactly 10. Therefore, the probability is 0.