Question

Giving a test to a group of students, the grades and gender are summarized below

	A	B	C	Total
Male	4	10	11	25
Female	12	8	17	37
Total	16	18	28	62

If one student is chosen at random,

Find the probability that the student was male:    

Find the probability that the student was female AND got a "B":    

Find the probability that the student was male OR got an "B":    

If one student is chosen at random, find the probability that the student got a 'C' GIVEN they are female:

Answer 1

Page A Male Female Total 4 12 16 B 10 8 18 C 11 7 28 Total 25 37. 62 O P/ Student is Male] = 25/62 © P[ Fowale f8] = 8/62 O P[Male U B] = P ( Male + P (6) - p/mall f8] 4 = 25 tr8 - 10 - 62 62 in = 62 33 62 - p/c / Female) = P/ C f Female] Plfernal] 17162 37/62 17 37