Question

One college found that during one semester 1,259 students in its four most popular majors had the following class distributions. Use the table below to determine the probabilities for a randomly selected student in this group.

	First year	Sophomore	Junior	Senior	Row total
Business	115	90	105	111	421
Psychology	88	95	91	96	370
Nursing	85	81	79	76	321
Biology	63	45	25	14	147
Column total	351	311	300	297	1259

Compute the following probability:

a. What is the probability that a randomly selected student major in Psychology?

b. What is the probability that he/she is sophomore if he/she majors in nursing?

c. What is the probability that a randomly selected student major in Biology or Senior?

d. Is whether a student who major in business independent of Junior? Explain using probabilities.

(no excel work)

Answer 1