# Question: the probability distribution for a discrete random variable x is...

###### Question details

The probability distribution for a discrete random variable X is given in the table that follows.

X 2 3 4 5 6

P(X) 0.40 0.20 0.24 0.08 0.08

Your answers to the following questions must be expressed as a decimal correct to 3dp.

a) Find the probability that X is at least 4.

Answer:

b) Find the mean of X.

Answer:

c) Find the standard deviation of X.