Answer to Question #301481 in Statistics and Probability for Mylene Pom

Question

A technician has to choose three chips at random from 4 chips 2 of which are defective. Let's Z represent the number of non- defective chips chosen. What are the possible values of Z given that the first chip chosen is defective?

Answer 1

Solution:

Total number, N=4

Defective, d=2

Non-defective, n=2

He has to choose three chips.

Z represent the number of non- defective chips.

Given that the first chip chosen is defective.

Now, he has to choose two chips.

Now, N=3

d=1,

n=2

S={nn,nd,dn}

So, Z={1,2}