Answer:
Step-by-step explanation:
given that a batch of 140 semiconductor chips is inspected by choosing a sample of 5 chips without replacement.
10 chips do not conform to customer requirements.
i.e. out of 140 chips 10 are defective and 130 are good
a) 5 chips can be selected form 140 chips in 140C5 ways
= 416965528
b) For containing exactly one non conforming chip we have one selected from 10 and other 4 selected from 130
No of ways = [tex]10C1 (130C4)\\=10(11358880)\\=113588800[/tex]
c) For atleast one nonconforming chip we can calculate as total - no non conforming
i.e. [tex]416965528-130C5\\= 416965528-286243776\\=130721752[/tex]
