Answer:
0.0313
Step-by-step explanation:
Given that in the shipment of 71 vials, only 13 do not have hairline cracks
Probability of not having a hairline cracks = [tex]\frac{13}{71}[/tex]
If you randomly select 2 vials from the shipment
(Probability of not having a hairline cracks)' = [tex]\frac{13-1}{71-1}[/tex] = [tex]\frac{12}{70}[/tex]
what is the probability that none of the 2 vials have hairline cracks.
i.e [tex](\frac{13}{71}) * (\frac{12}{70})[/tex]
= 0.183 × 0.171
= 0.0313
Hence, the probability that none of the 2 vials have hairline cracks = 0.0313
