Question 824479
A sales person has 10 percent chance of making a sale to any customer who is called upon. If 20 calls are made,
----
Binomial Problem with n = 20 and p(sale) = 0.1
--------------- 
What is the chance that:
-----
(i) P(fewer than three sales are made) 
= P(0<= x <=2) 
= binomcdf(20,0.1,2) 
= 0.6769
---------------------------- 
(ii) P(At least one sale is made) 
= 1 - P(x = 0) 
= 1-0.9^20 
= 0.8784
----------------------------  
(iii) P(More than five are made) 
= P(6<= x <=20) 
= 1-binomcdf(20,0.1,5) 
= 0.0113
----------------
Cheers,
Stan H.
================