JujiGatame
New member
- Joined
- Jun 12, 2021
- Messages
- 7
Hello everyone!
Here is the task that I have problem solving.
We roll the dice 4 times. Determine a random variable that describes k times will fall 6. Calculate expectation and variance.
I know that:
X - "counts how many times has fallen 6"
R(X) = {0, 1, 2, 3, 4}
n = 4
p = 1/6
q = 5/6
I know how to get expectation and variance, but I don't know how to get this k in formula.
Here is the task that I have problem solving.
We roll the dice 4 times. Determine a random variable that describes k times will fall 6. Calculate expectation and variance.
I know that:
X - "counts how many times has fallen 6"
R(X) = {0, 1, 2, 3, 4}
n = 4
p = 1/6
q = 5/6
I know how to get expectation and variance, but I don't know how to get this k in formula.