Question 907111
Approximately 26% of the calls to an airline reservation phone line result in a reservation being made.
(a) Suppose that an operator handles 10 calls. What is the probability that none of the 10 calls result in a reservation?

probability = {{{(1 - 0.26)^10}}} = {{{highlight(0.049)}}}

 (b) What assumption did you make to calculate the probability in Part (a)? 

Assumption: The results of calls are independent of each other.

(c) What is the probability that at least one call results in a reservation being made? (Give the answer to 3 decimals places.)

probability = {{{1 - (1 - 0.26)^10}}} = {{{highlight(0.951)}}}