SOLUTION: If we inspect envelopes by drawing 4 of them without replacement from every lot of 100, what is the probability of getting 4 clean envelopes although 3% of them contain spots?

Question 724280: If we inspect envelopes by drawing 4 of them without replacement from every lot of 100, what is the probability of getting 4 clean envelopes although 3% of them contain spots?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
If we inspect envelopes by drawing 4 of them without replacement from every lot of 100, what is the probability of getting 4 clean envelopes although 3% of them contain spots?
----------------------
# of ways to succeed: 97C4
# of possible results: 100C4
---
P(4 clean) = 97C4/100C4 = 0.8836
--------------------
Cheers,
Stan H.
================

RELATED QUESTIONS
If we inspect paper by drawing 5 sheets (without replacement) from every batch of 1000,... (answered by stanbon)

4. A quality-control procedure for testing ready-flash disposable cameras consists of... (answered by edjones)

what is the probability of drawing 5 face cards from a 52 card deck? without... (answered by swincher4391)

What is the probability of drawing four cards that are not red from a 52 deck of cards... (answered by stanbon)

find the probability of randomly drawing two aces in succession from an ordinary deck of... (answered by robertb)

If 2 cards are drawn from a 52 card deck without replacement, what is the probability of... (answered by stanbon)

What is probability of drawing 3 nuts from box A box contains 2 washer 3 nuts and 4... (answered by richwmiller)

if two cards are removed from a ordinary deck of card without replacement, what is the... (answered by Edwin McCravy)

we are drawing two cards without replacement from a standard 52- card deck. find the... (answered by stanbon)