Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing


The quality-control inspector of a production plant will reject a batch of syringes if two or more defective syringes are found in a random sample of nine syringes taken from the batch. Suppose the batch contains 5% defective syringes. What is the probability that the batch will be accepted? (Round your answer to three decimal places.)

  • one year ago
  • one year ago

  • This Question is Open
  1. wio
    Best Response
    You've already chosen the best response.
    Medals 1

    So we want to find:\[ \Pr(X\lt 2) = \Pr(X=0)+\Pr(X=1) \]

    • one year ago
  2. wio
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\large \Pr(X=0) = \binom{9}{0}(1-0.05)^9(0.05)^0 =(1-0.05)^9 \]\[\large \Pr(X=1) =\binom{9}{1} (1-0.05)^8(0.05)^1 =9 (1-0.05)^8(0.05)^1 \]

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...


  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.