Approximately 65% of all marketing personnel are extroverts, whereas about 70% of all computer programmers are introverts.
At a meeting of 15 marketing personnel, what is the probability that 10 or more are extroverts?

Question

Approximately 65% of all marketing personnel are extroverts, whereas about 70% of all computer programmers are introverts. 
At a meeting of 15 marketing personnel, what is the probability that 10 or more are extroverts?

anonymous · Answer

this has a classic bernuolli flavor to it, more specifically it appears that a binomial distribution fits well. therefore, p=comb(15,10)(.65)^10(.35)^5. final answer is .2123.

anonymous · Answer

@Coureges Is that the formula for 10 or MORE? Seems like the formula for 10.

anonymous · Answer

Your right that is just for ten, for ten or more 0.5642.