Of the items manufactured by a certain process, 20% are defective. Of the defective items, 60% can be repaired. a. Find the probability that a randomly chosen item is defective and cannot be repaired. b. Find the probability that exactly 2 of 20 randomly chosen items are defective and cannot be repaired.

a) 0.08

b) 0.157

Step-by-step explanation:

a) P(defective) = 0.2

P(no repair) = 1 - 0.6 = 0.4

P(no repair & defective)

= 0.2×0.4 = 0.08

b) 20C2×(0.08)²×(0.92)^18

= 0.156947197

d

step-by-step explanation:

d

i get you, what you should do is think of the positive things that would come out of it. it will make yours parents proud and raise your grade. you should always try and if you can't focus tell the teacher.