1. ## throwing dice

X: numbers of the throws until you get the first 6 with a normal dice.

a)
ΩX= ?
b) P(X=4)=?
c) PX(x)=?
d) P(3<X<or =7)=?

2. Originally Posted by sf1903
X: numbers of the throws until you get the first 6 with a normal dice.

a)
ΩX= ?
b) P(X=4)=?
c) PX(x)=?
d) P(3<X<or =7)=?
By ΩX do you mean the expectation (or mean) of X, usually denoted here by E(X)?

CB