Question

A survey conducted by PT Commuter Line shows that 5% are commuters spend ≥ 1 hour...

A survey conducted by PT Commuter Line shows that 5% are commuters
spend ≥ 1 hour traveling from home to office.
a. If 10 commuters are chosen to be surveyed one day, what are the chances of 3 people among them
spend ≥ 1 hour traveling from home to office
b. If 10 commuters are chosen to be surveyed one day, how many chances are there 2 people who
spend <1 hour traveling from home to office
c. If PT Commuter Line has 2000 employees, what is the average and variance of the number
employees who spend ≥1 hour traveling from home to office

Math   Statistics-And-Probability   
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