anonymous
  • anonymous
the probability that a professional baseball player will get a hit is 1/3. Calculate the exact probability that he will get at least 3 hits in 5 attempts.
Trigonometry
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
that was wrong, sorry
anonymous
  • anonymous
at least 3 means 3 or 4 or 5 you have to compute each of these and add them up
anonymous
  • anonymous
exactly 3 is \[P(x=3)=\binom{5}{3}\left(\frac{1}{3}\right)^3\left(\frac{2}{3}\right)^2\] meaning 3 hits, 2 not hits, and \(\binom{5}{3}=\frac{5\times 4}{2}=10\) ways to get order the three hits and two not hits

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anonymous
  • anonymous
The answer has to be the exact probability so shouldnt it be written differently?
anonymous
  • anonymous
yeah you have to actually compute that number, and then do it again for \(P(x=4)\) and \(P(x=5)\)
anonymous
  • anonymous
\[P(x=4)=\binom{5}{4}\left(\frac{1}{3}\right)^4\left(\frac{2}{3}\right)\]and \[P(x=5)=\left(\frac{1}{3}\right)^5\]
anonymous
  • anonymous
For the answer i got 17/81 correct?

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