In the toss of 5 dice, what is the probability of obtaining exactly 5 ones?

(1/6) (1/6) (1/6) (1/6) (1/6) = 1 / 6^5 = 1 / 7776

P(getting "1" in toss of 1 die) = 1/6

P(getting 5 "1" in toss of 5 dice) = (1/6)⁵ = 1/7776

Number of possible outcomes on a 5 die roll : 6^5

We want {1,1,1,1,1}, we want all five of them to come up 1, that is 1 outcome out of 6^5, or

(1/6)^5 is the same.

Depends...we talking six-sided dice or D10s?