# Question: Out of 140 million cellular telephone subscribers in the United

Out of 140 million cellular telephone subscribers in the United States, 36 million use Verizon.6

a. Ten wireless customers are chosen. Under what conditions is the number of Verizon customers a binomial random variable?

b. Making the required assumptions above, find the probability that at least two are Verizon customers.

a. Ten wireless customers are chosen. Under what conditions is the number of Verizon customers a binomial random variable?

b. Making the required assumptions above, find the probability that at least two are Verizon customers.

**View Solution:**## Answer to relevant Questions

An advertisement claims that two out of five doctors recommend a certain pharmaceutical product. A random sample of 20 doctors is selected, and it is found that only 2 of them recommend the product. a. Assuming the ...Recently, the head of the Federal Deposit Insurance Corporation (FDIC) revealed that the agency maintains a secret list of banks suspected of being in financial trouble. The FDIC chief further stated that of the nation's ...The time interval between two successive customers entering a store in a mall is exponentially distributed with a mean of 6.55 seconds. a. What is the probability that the time interval is more than 10 seconds? b. What is ...Hedge funds are institutions that invest in a wide variety of instruments, from stocks and bonds to commodities and real estate. One of the reasons for the success of this industry is that it manages expected return and risk ...Let X be a normally distributed random variable with mean 410 and standard deviation 2. Find the probability that X will be between 407 and 415.Post your question