Chapter 5, Problem 18RP

(a)

To determine

Use therandom variable notation to represent the event that the number of busy lines is exactly four.

(b)

To determine

Use therandom variable notation to represent the event that the number of busy lines is at least four.

(c)

To determine

Use therandom variable notation to represent the event that the number of busy lines is between two and four, inclusive.

(d)

To determine

Use therandom variable notation to represent the event that the number of busy lines is at least one.

(e)

To determine

Determinethe probability $P\left(Y=4\right)$ using special addition rule and probability distribution.

(f)

To determine

Determinethe probability $P\left(Y\ge 4\right)$ using special addition rule and probability distribution.

(g)

To determine

Determinethe probability $P\left(2\le Y\le 4\right)$ using special addition rule and probability distribution.

(h)

To determine

Determinethe probability $P\left(Y\ge 1\right)$ using special addition rule and probability distribution.