A secretary periodically checks to see how many of the three lines into the office are busy. Her findings for one week were the following.

No. lines busy Frequency

0 20

1 65

2 25

3 10

Let the random variable X be the number of lines busy. Find the probability distribution of X.

My answer is.

X P(X)

0 0.20

1 0.65

2 0.25

3 0.10

Thanks for checking my answer.