1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Stats Help

  1. Mar 16, 2006 #1
    Okay so I did this problem and got it wrong but I get one more chance to get it right. I tried using Binomial Dist to solve it but I failed.

    30% of all M&Ms are brown. If 7 M&Ms are randomly selected, what is the probability that at most 1 is brown?

    I thought I would use 0 and 1 but I guess not. Can someone help me?
     
  2. jcsd
  3. Mar 17, 2006 #2

    mathman

    User Avatar
    Science Advisor
    Gold Member

    p0=.37
    p1=7*.36*.7

    Add them up.
     
  4. Mar 19, 2006 #3

    mathman

    User Avatar
    Science Advisor
    Gold Member

    Sorry, got the probs reversed. switch .3 and .7.

    p0=.77
    p1=7*.76*.3

    Add them up.
     
  5. Apr 16, 2006 #4
    For Binomial Distribution,
    take n=7, p=0.3, q=1-p=0.7.

    P(X<=1)=P(X=0)+P(X=1)=q^7+n*p*q^6

    thts it gys...
    enjy
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Stats Help
  1. Help on stats prob (Replies: 3)

  2. Stats help please (Replies: 3)

  3. Stat help (Replies: 7)

Loading...