g It is known that 20% of products on a production line are defective. Products are inspected until first defective is encountered. a) What is the probability that the experimenter must inspect six products

Question:

It is known that 20% of products on a production line are defective. Products are inspected until first defective is encountered. a) What is the probability that the experimenter must inspect six products to find a defective product?

Answer:

P (x = 6) = 0.0655

P (x = 6) = 6.55%

Step-by-step explanation:

It is given that 20% of products on a production line are defective.

p = 0.20

Then

q = 1 - p = 1 - 0.20 = 0.80

Which means that 80% of products on the production line are not defective.

We want to find out the probability that the experimenter must inspect six products to find a defective product.

Let x is the number of inspections to get a defective product.

P (x = 6) = ?

If out of 6 inspections 1 is defective then it means 5 are not defective

so the probability is

P (x = 6) = p¹ * q⁵

P (x = 6) = 0.20¹ * 0.80⁵

P (x = 6) = 0.20 * 0.32768

P (x = 6) = 0.0655

P (x = 6) = 6.55%

Therefore, there is 6.55% chance that the experimenter finds a defetive product in 6 inspections.