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

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