Question

If a production line has a 20% defective rate. What is the average number of inspections to obtain the first defective?

Answer 1

Answer:

5

Explanation:

Well it can be solved using geometric distribution. But i used kind of GK.

Like if 0.2 is defected out of 1 then

0.2 requires = 1 inspection

so, 1.0 requires = 1÷0.2 inspection

= 5.

Hope its right !