David's Gasoline Station Offers 4 Cents Off Per Litre If

Multiple Choice

David's gasoline station offers 4 cents off per litre if the customer pays in cash and does not use a credit card. Past evidence indicates that 40% of all customers pay in cash. During a one-hour period twenty-five customers buy gasoline at this station.
What is the probability that no more than twenty pay in cash?

A) 0.0
B) 0.1
C) 0.9
D) 1.0
E) None of the choices are correct