A poll conducted by Gallup Canada on June 21, 2000, showed that 40 percent of investors
invested in high-tech stocks. Suppose 10 investors were selected randomly on that day.
(a) What is the probability that exactly two of the selected investors would have invested in high-tech
stocks?

Question

A poll conducted by Gallup Canada on June 21, 2000, showed that 40 percent of investors 
invested in high-tech stocks. Suppose 10 investors were selected randomly on that day. 
(a) What is the probability that exactly two of the selected investors would have invested in high-tech 
stocks?

anonymous · Answer

@ganeshie8 Can you help I have a midterm tomorrow? :(

anonymous · Answer

or @dan815 or @SithsAndGiggles I'm a little desperate. :s

anonymous · Answer

@perl ?

ganeshie8 · Answer

Its a binomial distribution with n = 10, p = 0.4, q = 0.6 :
$$\large  P(X=2) =  \binom{10}{2}  (0.4)^2(0.6)^8$$