You roll a fair six-sided die (all 6 of the possible results of a die roll are equally likely) 5 times, independently. Let X be the number of times that the roll results in 2 or 3. Find the numerical values of the following.

Question

You roll a fair six-sided die (all 6 of the possible results of a die roll are equally likely) 5 times, independently. Let  X  be the number of times that the roll results in 2 or 3. Find the numerical values of the following.

a)  pX(2.5)=
b)   pX(1)=

Tunin · Accepted Answer

a) 0 b) 80/243