1. Through a telephone survey, a low-interest bank credit card is offered to 400 households. The responses are as tabled. (. A travs de una encuesta telefnica, se ofrece una tarjeta de crdito bancaria a bajo inters a 400 hogares.Las respuestas son como estn tabuladas.)

	Income $60,000	Income > $60,000
Accept offer	40	30
Reject offer	210	120

a.	Develop a joint probability table and show the marginal probabilities.
b.	What is the probability of a household whose income exceeds $60,000 and who rejects the offer?
c.	If income is $60,000, what is the probability the offer will be accepted?
d.	If the offer is accepted, what is the probability that income exceeds $60,000?