# Of the 232 airports available for public use in Themeliville, 121 are paved and lighted. For a simple random sample of 50, what is the probability that between 27 and 31 of the airports in the sample will be paved and lighted?

##### 1 Answer

Aug 18, 2016

#### Explanation:

so we have the probability of being lighted as

this can be modeled using the binomial cumulative distribution thus