Use the appropriate normal distribution to approximate the resulting binomial distribution.

Jorge sells magazine subscriptions over the phone. He estimates that the probability of his making a sale with each attempt is 0.11. What is the probability of Jorge making more than 11 sales if he makes 90 calls? (Round your answer to four decimal places.)

Question

Use the appropriate normal distribution to approximate the resulting binomial distribution.

Jorge sells magazine subscriptions over the phone. He estimates that the probability of his making a sale with each attempt is 0.11. What is the probability of Jorge making more than 11 sales if he makes 90 calls? (Round your answer to four decimal places.)

anonymous · Answer

This is a binomcdf problem The difference between binompdc and binomcdf are decribed here: http://www.statisticshowto.com/difference-binompdf-binomcdf/

anonymous · Answer

Since the probablity of all the possible combinations of a probablity is 100% or 1 we have take the probablity of getting 0-11 successes and subtract that from 1 (since that 1-probability of getting less than 11 is not what we want) do you follow 
@gjasmin ?