anonymous
  • anonymous
If the probability of hearing a "yes" to a campaign contribution drive is 0.07, and 250 requests are made, what is the probability of getting at least 20 positive responses?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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ybarrap
  • ybarrap
How are you thinking about solving this problem?
anonymous
  • anonymous
honestly, I have no clue...
ybarrap
  • ybarrap
Have you heard about the Binomial Distribution? https://en.wikipedia.org/wiki/Binomial_distribution You will need this

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anonymous
  • anonymous
Okay, I think I got this now... kinda
ybarrap
  • ybarrap
Ok. Tell me.
ybarrap
  • ybarrap
Just tell me in a sentence, don't worry about the math
anonymous
  • anonymous
Sentences in math, oi... its actually easy for write out the equation instead...Not quite sure about this but here is what I got (250/20)*(0.07)^20*(0.93^231)=0.846 Am I right or wrong?
ybarrap
  • ybarrap
You've got the flavor of it. We need to count all the ways of having more than 20 people out of 250. This is hard. Let's do something easier, let's count the number of ways to have LESS than 20 people. That's easier. That's our strategy.l In a sentence (or two).
ybarrap
  • ybarrap
Once we have the probability of less or equal 20, we will subtract this from 1 to get the probability of greater than 20.
anonymous
  • anonymous
Okay, let me try working something else out real quick
anonymous
  • anonymous
I checked with my teacher and she helped me work the problem but thanks for the help, you got me started so i could finish.
ybarrap
  • ybarrap
You're welcome

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