Question 849950
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Hi,
p = .08,  n = 13
using TI Calculator
P(x=3) = The syntax is binompdf(n, p, x-value)= binompdf(13, .08,3)
Or
 P = *[tex \large{{13}\choose{3}}](.08)^3(.92)^10  
Note: The probability of x successes in n trials is: 
P (x)= *[tex \large{{n}\choose{x}}] (p)^x(q)^(n-x) where p and q are the probabilities of success and failure respectively. 
In this case p = .08 & q  = .92
*[tex \large{{n}\choose{x}}] = {{{(n!)/x!(n - x)!)}}} 
*[tex \large{{13}\choose{3}}] = {{{13*12*11/(3*2) = 286}}}