anonymous
  • anonymous
HEEEEEEEEEEEEELPPPP! HELP! HELP!!!!! EMERGENCY!!!!!!!!!!!!!!!!! @Thesmartone @hero @kainui @wio
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
and your questions is? .-.
anonymous
  • anonymous
@Luigi0210 @Nnesha @ParthKohli
anonymous
  • anonymous
@ganeshie8 think she wants you .-.

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anonymous
  • anonymous
The probability of finding a broken cookie in a bag of chocolate chip cookies is P= .03. Find the probability of getting at least 2 broken cookies in a bag containing 36 cookies. A) .91 B) .294 C) .33 D) .06 @ganeshie8
ganeshie8
  • ganeshie8
binomial distribution
ganeshie8
  • ganeshie8
P(X>=2) = 1 - P(X=0) + P(X=1)
ganeshie8
  • ganeshie8
do you know how to find P(X=0), the probabiltiy for getting 0 broken cookies ?
anonymous
  • anonymous
no :/ i dont get this at all
ganeshie8
  • ganeshie8
thats ok notice that probability for getting a broken cookie = 0.03 therefore probability for NOT getting a broken cookie = 0.97 yes ?
ganeshie8
  • ganeshie8
since we want 0 broken cookies : P(X=0) = 0.97^36
anonymous
  • anonymous
so its 0.33??
ganeshie8
  • ganeshie8
thats the probability for getting 0 broken cookies but thats not the answer
anonymous
  • anonymous
oh okay
ganeshie8
  • ganeshie8
next find the probabilty for getting 1 broken cookie
anonymous
  • anonymous
ok what is next? how did u find .294?
ganeshie8
  • ganeshie8
did you get how we arrived at 0.33 for the probability of getting 0 broken cookies ?
anonymous
  • anonymous
yes sir!
ganeshie8
  • ganeshie8
good, similarly see if you can find the probability of getting 1 broken cookie
ganeshie8
  • ganeshie8
give it a try
anonymous
  • anonymous
I'm not sure.. i tried but i don't know how to get it
anonymous
  • anonymous
@ganeshie8
ganeshie8
  • ganeshie8
1 broken cookie means, 35 unbroken cookies, yes ?
anonymous
  • anonymous
yes
ganeshie8
  • ganeshie8
so the probability is 0.03*0.97^35 ?
ganeshie8
  • ganeshie8
but wait, that broken cookie could be either 1st or 2nd or 3rd or... 36th there are 36 ways it can happen so the probability for getting 1 broken cookie is actually 36* 0.03*0.97^35
anonymous
  • anonymous
okay so that will be 0.2?
ganeshie8
  • ganeshie8
try again, im getting 0.37 something
anonymous
  • anonymous
i just want to know how u got .294
anonymous
  • anonymous
yeah same.. i just rounded it
anonymous
  • anonymous
0.4 i meant sorry
ganeshie8
  • ganeshie8
so the probability of getting at least 2 broken cookies is \[\large 1-(.97^{36} + 36*0.03*0.97^{35})\]
anonymous
  • anonymous
okay thank you so much!! appreciate it!

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