Mark the correct alternative in the following:
A box contains 100 pens of which 10 are defective. What is the probability that out of a sample of 5 pens drawn one by one with replacement at most one is defective?
Given:
Total pens=100
Defective pens=10
n=5
P(atmost one non-defective pen)=?
P(defective pens
=p
P(atmost one non-defective pen)=p(x<10)
=p(x=0)+p(x=1)
= 5C0 p0 q5+5pq4
1