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13 votes
13 votes
Your friend has a coln that is not fair. It comes up heads 70% of the time and talls 30% of the time. You flip it twice. Let Xbe the number of heads that come up. Find the probability distribution for X

Your friend has a coln that is not fair. It comes up heads 70% of the time and talls-example-1
User Lenar Hoyt
by
2.3k points

1 Answer

24 votes
24 votes

Let X be the number of heads that come up


\begin{gathered} \text{Probability of head = 70\% = }(70)/(100) \\ \text{Probability of tail = 30\% = }(30)/(100) \end{gathered}

Step 1: Write out the formula for the binomial probability distribution


P_x=^nC_xp^xq^(n-x)
undefined

User Lateisha
by
2.8k points
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