Question

I got this connected from the tutor I need to know how to do the factorial in this formula to bio normal distribution formula The symbol that looks like an!

Answer 1

Binomial distribution formula:

`P(x)=(n!)/((n-x)!x!)*p^(`x)*q^(n-x)`

For the gien situations:

* n=15, p=0.4, find P(4 successes)

`\begin{gathered} n=15 \\ p=0.4 \\ q=1-p=1-0.4=0.6 \\ x=4 \end{gathered}`
`P(4)=(15!)/((15-4)!4!)*0.4^4*0.6^(15-4)`