Meehan98
  • Meehan98
A binomial experiment has 5 trials in which p = 0.7. What is the probability of getting at least 2 successes?
Mathematics
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SOLVED
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jamiebookeater
  • jamiebookeater
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Meehan98
  • Meehan98
So, I thought that I understood how to do this, but I'm getting something wrong! P(2)=\[_{5} C _{2} (.7)^{2} (.3)^{3}=.1323\] P(3)=\[_{5}C _{3} (.7)^{3} (.3)^{2}=.3087\] and added they equal .441
Meehan98
  • Meehan98
The possible answers are: 0.9692 0.4417 0.4683 0.7481
anonymous
  • anonymous
"At least 2 successes" out of "5 trials". You're missing \(P(X=4,5)\).

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Meehan98
  • Meehan98
Okay, let me work that out real quick!
Meehan98
  • Meehan98
Awesome, so that would be .9692! Thank you!!
anonymous
  • anonymous
That's right.
anonymous
  • anonymous
yw

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