Respuesta :
Probability of selecting a non-detective cog = 16/20
Required Probability = 16/20 * 15/19 * 14/18* 13/17 = 364/969
= 0.3756 or 37.56 % answer
=
Answer:
[tex]\bf\implies \text {Required Probbaility = }\frac{364}{969}[/tex]
Step-by-step explanation:
Number of cogs produced by the company = 20
Number of cogs which are defective = 4
no. of cogs which are not defective = 20 - 4
= 16
Now, we need to find the probability of selecting 4 cogs which are not defective
[tex]\text{Required Probability = }\frac{16}{20}\times \frac{15}{19}\times \frac{14}{18}\times\frac{13 }{17}\\\\\implies\text{Required Probability = }\frac{43680}{116280}\\\\\bf\implies \text {Required Probability = }\frac{364}{969}[/tex]
