Respuesta :
O.1250 is the probability that they will purchase no books on this visit to the bookstore.
What is probability ?
The area of mathematics known as probability deals with numerical representations of the likelihood that an event will occur or that a statement is true. An event's probability is a number between 0 and 1, where, roughly speaking, 0 denotes the event's impossibility and 1 denotes certainty.
The appropriate response is
Let P(J)
Probability of John to purchase 0 books
Let P(B)
Probability of Beth to purchase 0 books
P(J∩B)
Probability that both john and Beth will purchase 0 books that is a total of 0 books is purchased.
the decisions to purchase books are two independents events,
P(J∩B) = P(J) * P(B)
P(J) = 0.5
P(B) = 0.25
P(J∩B) = 0.5 * 0.25= P(J∩B) = 0.125
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