Samples of size n = 1500 are randomly selected from the population of numbers (0 through 9) produced by a random-number generator, and the proportion of odd numbers is found for each sample. What is the distribution of the sample proportions?

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?