Jamba Juice is a leading manufacturer and exporter of the best fruit juices across markets. They sell fresh juice in glass bottles. An earlier report shows that the bottles used by them indicate 1% having one or more faults.

The company uses a sample of 20 bottles from their production line for quality checks.

a. Determine the expected number of bottles having one or more faults.

b. What is the probability that there will be zero nonconforming bottles?

c. Explain whether there is an improvement needed in the quality of bottles.