A company optionally equips its newly developed PC Ibson with 2 or 3 hard disk drives and with or without extra software and analyzes the first 1000 orders: A PC is selected at random from the first...

A company optionally equips its newly developed PC Ibson with 2 or 3 hard disk drives and with or without extra software and analyzes the first 1000 orders:

A PC is selected at random from the first 1000 orders. Let A be the event that this PC has three hard disk drives and let B be the event this PC has extra software.

(1) Determine the probabilities

P(A), P(B), and P(A ∩ B)

from the matrix.

(2) By using the rules developed in section 1.1 determine the probabilities

P(A ∪ B), P(A|B), P(B|A), P(A ∪ B|) and  P(|).